Register      Login
Emu Emu Society
Journal of BirdLife Australia
ROWLEY REVIEW

Threats from introduced birds to native birds

Jack Baker A B , Kerinne J. Harvey A and Kris French A
+ Author Affiliations
- Author Affiliations

A Institute for Conservation Biology and Environmental Management, University of Wollongong, NSW 2522, Australia.

B Corresponding author. Email: jbaker@uow.edu.au

Emu 114(1) 1-12 https://doi.org/10.1071/MU12122
Submitted: 21 December 2012  Accepted: 5 August 2013   Published: 7 November 2013

Abstract

Invasion by introduced species is a global threat to the natural environment, with major consequences for biodiversity, economies and societies. This paper reviews the literature documenting interactions between introduced and native bird species. Surprisingly, we found only ten cases of an introduced bird being involved in a process that threatened a population of a native bird with extinction and conclude there is little evidence that introduced birds are a major threat to avian diversity globally. The conservation priorities for managing interactions between introduced and native birds are: (1) strong, precautionary biosecurity policies and practices to discourage future introductions; (2) gaining knowledge about interspecific interactions; (3) managing threats where they affect the persistence or recovery of threatened and endemic island bird species; (4) managing the threat of hybridisation and (5) best practice, cost-effective management that defines threatening processes to avian diversity and uses adaptive management for threat abatement. Our review highlights the lack of evidence for detrimental effects of introduced birds on native avifauna and highlights the need for future work in this area.

Additional keywords: alien, brood parasitism, disease, hybridisation, interspecific competition, invasive birds, predation.


References

Armstrong, D. P., and McLean, I. G. (1995). New Zealand translocations: theory and practice. Pacific Conservation Biology 2, 39–54.

Arruga, M. V., Tejedor, M. T., Villarroel, M. R., Heriz, A., Ferreira, E., and Abenia, F. J. (1996). Genetic studies of Alectoris rufa and A. graeca in Spain. Archivos de Zootecnia 45, 339–344.

Atkinson, C. T., Woods, K. L., Dusek, R. J., Sileo, L. S., and Iko, W. M. (1995). Wildlife disease and conservation in Hawaii: pathogenicity of avian malaria (Plasmodium relictum) in experimentally infected Iiwi (Vestiaria coccinea). Parasitology 111, S59–S69.
Wildlife disease and conservation in Hawaii: pathogenicity of avian malaria (Plasmodium relictum) in experimentally infected Iiwi (Vestiaria coccinea).Crossref | GoogleScholarGoogle Scholar | 8632925PubMed |

Auld, T. D., and Keith, D. A. (2009). Dealing with threats: integrating science and management. Ecological Management & Restoration 10, S79–S87.
Dealing with threats: integrating science and management.Crossref | GoogleScholarGoogle Scholar |

Balmford, A., Carey, P., Kapos, V., Manica, A., Rodrigues, A. S. L., Scharlemann, J. O. P. W., and Green, R. E. (2009). Capturing the many dimensions of threat: comment on Salafsky et al. Conservation Biology 23, 482–487.
Capturing the many dimensions of threat: comment on Salafsky et al.Crossref | GoogleScholarGoogle Scholar | 19323683PubMed |

Baratti, M., Ammannati, M., Magnelli, C., and Dessi-Fulgheri, F. (2005). Introgression of Chukar genes into a reintroduced Red-legged Partridge (Alectoris rufa) population in central Italy. Animal Genetics 36, 29–35.
Introgression of Chukar genes into a reintroduced Red-legged Partridge (Alectoris rufa) population in central Italy.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXit1GgsL0%3D&md5=04784c1f984aa00c7f818cbb30cb3fa8CAS | 15670128PubMed |

Barbanera, F., Negro, J. J., Di Giuseppe, G., Bertoncini, F., Cappelli, F., and Dini, F. (2005). Analysis of the genetic structure of Red-legged Partridge (Alectoris rufa, Galliformes) populations by means of mitochondrial DNA and RAPD markers: a study from central Italy. Biological Conservation 122, 275–287.
Analysis of the genetic structure of Red-legged Partridge (Alectoris rufa, Galliformes) populations by means of mitochondrial DNA and RAPD markers: a study from central Italy.Crossref | GoogleScholarGoogle Scholar |

Barilani, M., Bernard-Laurent, A., Mucci, N., Tabarroni, C., Kark, S., Perez Garrido, J. A., and Randi, E. (2007). Hybridisation with introduced Chukars (Alectoris chukar) threatens the gene pool integrity of native Rock (A. graeca) and Red-legged (A. rufa) Partridge populations. Biological Conservation 137, 57–69.
Hybridisation with introduced Chukars (Alectoris chukar) threatens the gene pool integrity of native Rock (A. graeca) and Red-legged (A. rufa) Partridge populations.Crossref | GoogleScholarGoogle Scholar |

BirdLife International (2012). Species factsheet: Hawaiian Duck Anas wyvilliana. (BirdLife International: Cambridge, UK.) Available at http://www.birdlife.org/datazone/speciesfactsheet.php?id=436 [Verified 1 June 2012].

BirdLife International (2013). Species factsheet: Puerto Rican Vireo Vireo latimeri. (BirdLife International: Cambridge, UK.) Available at www.birdlife.org/datazone/speciesfactsheet.php?id=5577 [Verified 2 October 2013].

Blackburn, T. M., Pysek, P., Bacher, S., Carlton, J. T., Duncan, R. P., Jarosik, V., Wilson, J. R. U., and Richardson, D. M. (2011). A proposed unified framework for biological invasions. Trends in Ecology & Evolution 26, 333–339.
A proposed unified framework for biological invasions.Crossref | GoogleScholarGoogle Scholar |

Blanco-Aguiar, J. A., Gonzalez-Jara, P., Ferrero, M. E., Sanchez-Barbudo, I., Virgos, E., Villafuerte, R., and Davila, J. A. (2008). Assessment of game restocking contributions to anthropogenic hybridization: the case of the Iberian Red-legged Partridge. Animal Conservation 11, 535–545.

Blanvillain, C., Salducci, J. M., Tutururai, G., and Maeura, M. (2003). Impact of introduced birds on the recovery of the Tahiti Flycatcher (Pomarea nigra), a critically endangered forest bird of Tahiti. Biological Conservation 109, 197–205.
Impact of introduced birds on the recovery of the Tahiti Flycatcher (Pomarea nigra), a critically endangered forest bird of Tahiti.Crossref | GoogleScholarGoogle Scholar |

Bomford, M., and O’Brien, P. (1995). Eradication or control for vertebrate pests. Wildlife Society Bulletin 23, 249–255.

Bomford, M., and Sinclair, R. (2002). Australian research on bird pests: impact, management and future directions. Emu 102, 29–45.
Australian research on bird pests: impact, management and future directions.Crossref | GoogleScholarGoogle Scholar |

Borowske, A., Morgan, D. K. J., and Waas, J. R. (2012). Do heterospecific size and demeanour influence visitation behaviour of birds at urban foraging patches? Journal of Ethology 30, 75–82.
Do heterospecific size and demeanour influence visitation behaviour of birds at urban foraging patches?Crossref | GoogleScholarGoogle Scholar |

Bradstock, R. A., Auld, T. D., Keith, D. A., Kingsford, R. T., Lunney, D., and Sivertsen, D. P. (Eds) (1995). ‘Conserving Biodiversity: Threats and Solutions.’ (Surrey Beatty and NSW National Parks and Wildlife Service: Sydney.)

Burbidge, A. H., Maron, M., Clarke, M. F., Baker, J., Oliver, D. L., and Ford, G. (2011). Linking science and practice in ecological research: how can we do it better? Ecological Management & Restoration 12, 54–60.
Linking science and practice in ecological research: how can we do it better?Crossref | GoogleScholarGoogle Scholar |

Butler, C. J. (2003). Population biology of the introduced Rose-ringed Parakeet Psittacula krameri in the UK. Ph.D. Thesis, University of Oxford, Oxford, UK.

Commonwealth of Australia (1996). ‘National Strategy for the Conservation of Australia’s Biological Diversity.’ (Commonwealth of Australia: Canberra, ACT.)

Conover, M. R., and Kania, G. S. (1994). Impact of interspecific aggression and herbivory by Mute Swans on native waterfowl and aquatic vegetation in New England. Auk 111, 744–748.

Davis, M. A. (2003). Biotic globalization: does competition from introduced species threaten biodiversity? Bioscience 53, 481–489.
Biotic globalization: does competition from introduced species threaten biodiversity?Crossref | GoogleScholarGoogle Scholar |

Davis, M., Chew, M. K., Hobbs, R. J., Lugo, A. E., Ewel, J. J., Vermeij, G. J., Brown, J. H., Rosenzweig, M. L., Gardener, M. R., Carroll, S. P., Thompson, K., Pickett, S. T. A., Stromberg, J. C., Del Tredici, P., Suding, K. N., Ehrenfeld, J. G., Grime, J. P., Mascaro, J., and Briggs, J. C. (2011). Don’t judge species on their origins. Nature 474, 153–154.
Don’t judge species on their origins.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXntFKltrs%3D&md5=c424b7f28b71104733e7dbf6e63d1496CAS | 21654782PubMed |

DECC (2007) Lord Howe Island biodiversity management plan. Department of Environment and Climate Change (NSW), Sydney. Available at http://www.environment.nsw.gov.au/resources/parks/LHI_bmp.pdf [Verified 3 August 2012].

Deem, S. L., Cruz, M., Jimenez-Uzcategui, G., Fessel, B., Miller, R. E., and Parker, P. G. (2008). Pathogens and parasites: an increasing threat to the conservation of Galapagos avifauna. In: GALAPAGOS REPORT 2007–2008. (Galapagos Conservancy: Fairfax, VA.) Available at http://www.galapagos.org/wp-content/uploads/2012/04/biodiv7-pathogens-and-parasites.pdf [Verified 23 October 2013].

Dickman, C. R. (1996). Impact of exotic generalist predators on the native fauna of Australia. Wildlife Biology 2, 185–195.

Didham, R. K., Tylianakis, J. M., Hutchison, M. A., Ewers, R. M., and Gemmell, N. J. (2005). Are invasive species the drivers of ecological change? Trends in Ecology & Evolution 20, 470–474.
Are invasive species the drivers of ecological change?Crossref | GoogleScholarGoogle Scholar |

Drake, D. R., and Hunt, T. L. (2009). Invasive rodents on islands: integrating historical and contemporary ecology. Biological Invasions 11, 1483–1487.
Invasive rodents on islands: integrating historical and contemporary ecology.Crossref | GoogleScholarGoogle Scholar |

Farmer, K. L., Hill, G. E., and Roberts, S. R. (2005). Susceptibility of wild songbirds to the House Finch strain of Mycoplasma gallisepticum. Journal of Wildlife Diseases 41, 317–325.
| 1:STN:280:DC%2BD2MvktFSntQ%3D%3D&md5=15088b38ad28e6e1e786334466f80fb5CAS | 16107666PubMed |

Field, S. A., O’Connor, P. J., Tyre, A. J., and Possingham, H. P. (2007). Making monitoring meaningful. Austral Ecology 32, 485–491.
Making monitoring meaningful.Crossref | GoogleScholarGoogle Scholar |

Fischer, J., and Lindenmayer, D. B. (2000). An assessment of the published results of animal relocations. Biological Conservation 96, 1–11.
An assessment of the published results of animal relocations.Crossref | GoogleScholarGoogle Scholar |

Fowler, A. C., Eadie, J. M., and Engilis, A. (2009). Identification of endangered Hawaiian Ducks (Anas wyvilliana), introduced North American Mallards (A. platyrhynchos) and their hybrids using multilocus genotypes. Conservation Genetics 10, 1747–1758.
Identification of endangered Hawaiian Ducks (Anas wyvilliana), introduced North American Mallards (A. platyrhynchos) and their hybrids using multilocus genotypes.Crossref | GoogleScholarGoogle Scholar |

Freed, L. A., and Cann, R. L. (2009). Negative effects of an introduced bird species on growth and survival in a native bird community. Current Biology 19, 1736–1740.
Negative effects of an introduced bird species on growth and survival in a native bird community.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXhtlCrsrvL&md5=e4d5c568d67f8e394c070ef0520c9184CAS | 19765990PubMed |

Garnett, S. T., Szabo, J. K., and Dutson, G. (2011). ‘The Action Plan for Australian Birds 2010.’ (CSIRO Publishing: Melbourne.)

Genovesi, P. (2005). Eradications of invasive alien species in Europe: a review. Biological Invasions 7, 127–133.
Eradications of invasive alien species in Europe: a review.Crossref | GoogleScholarGoogle Scholar |

Gillespie, G. D. (1985). Hybridization, introgression, and morphometric differentiation between Mallard (Anas platyrhynchos) and Grey Duck (Anas superciliosa) in Otago, New Zealand. Auk 102, 459–469.

Global Invasive Species Database (2010). Anas platyrhynchos. (Invasive Species Specialist Group of the IUCN Species Survival Commission: Gland, Switzerland.) Available at http://www.issg.org/database/species/ecology.asp?si=1241&fr=1&sts=sss&lang=EN [Verified 1 June 2012].

Grant, P. R., and Grant, R. (1992). Hybridization of bird species. Science 256, 193–197.
Hybridization of bird species.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3cvitFOjtw%3D%3D&md5=fb4c9ac1d4f2cea1779d284be90fd173CAS | 17744718PubMed |

Griffith, B., Scott, J. M., Carpenter, J. W., and Reed, C. (1989). Translocation as a species conservation tool – status and strategy. Science 245, 477–480.
Translocation as a species conservation tool – status and strategy.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3cvitlKqsA%3D%3D&md5=e7f910cf3c74557b9d3d575a4e17e0e8CAS | 17750257PubMed |

Guay, P. J., and Tracey, J. P. (2009). Feral Mallards: a risk for hybridisation with wild Pacific Black Ducks in Australia? The Victorian Naturalist 126, 87–91.

Gurevitch, J., and Padilla, D. K. (2004). Are invasions a major cause of extinctions? Trends in Ecology & Evolution 19, 470–474.
Are invasions a major cause of extinctions?Crossref | GoogleScholarGoogle Scholar |

Hahn, I. J., Vergara, P. M., and Roemer, U. (2011). Importance of nest attributes in the conservation of endemic birds of the Juan Fernandez Archipelago, Chile. Bird Conservation International 21, 460–476.
Importance of nest attributes in the conservation of endemic birds of the Juan Fernandez Archipelago, Chile.Crossref | GoogleScholarGoogle Scholar |

Harmon, W. M., Clark, W. A., Hawbecker, A. C., and Stafford, M. (1987). Trichomonas gallinae in columbiform birds from the Galapagos Islands. Journal of Wildlife Diseases 23, 492–494.
| 1:STN:280:DyaL2szht1Sjug%3D%3D&md5=7a52941e32962361e72fe67ee37312c4CAS | 3625913PubMed |

Higgins, P. J. (Ed.) (1999). ‘Handbook of Australian, New Zealand and Antarctic Birds. Vol. 4: Parrots to Dollarbird.’ (Oxford University Press: Melbourne.)

Holling, C. S. (1978). ‘Adaptive Environmental Assessment and Management.’ (Wiley: London.)

Hughes, B. (1996). The Ruddy Duck Oxyura jamaicensis in the Western Palearctic and the threat to the White-headed Duck Oxyura leucocephala. In ‘The Introduction and Naturalisation of Birds’. (Eds J. S. Holmes and J. R. Simons.) pp. 79–86. (The Stationery Office: London.)

Hughes, B., Henderson, I., and Robertson, P. (2006). Conservation of the globally threatened White-headed Duck, Oxyura leucocephala, in the face of hybridization with the North American Ruddy Duck, Oxyura jamaicensis: results of a control trial. Acta Zoologica Sinica 52, 576–578.

Hughes, B. J., Martin, G. R., and Reynolds, S. J. (2008). Cats and seabirds: effects of feral domestic Cat Felis silvestris catus eradication on the population of Sooty Terns Onychoprion fuscata on Ascension Island, South Atlantic. Ibis 150, 122–131.
Cats and seabirds: effects of feral domestic Cat Felis silvestris catus eradication on the population of Sooty Terns Onychoprion fuscata on Ascension Island, South Atlantic.Crossref | GoogleScholarGoogle Scholar |

Hutton, I. (1991). ‘Birds of Lord Howe Island Past and Present.’ (I. Hutton: Coffs Harbour, NSW.)

Ingold, D. J. (1989). Nesting phenology and competition for nest sites among Red-headed and Red-bellied Woodpeckers and European Starlings. Auk 106, 209–217.

Ingold, D. J. (1994). Influence of nest-site competition between European Starlings and woodpeckers. Wilson Bulletin 106, 227–241.

Ingold, D. J. (1996). Delayed nesting decreases reproductive success in Northern Flickers: implications for competition with European Starlings. Journal of Field Ornithology 67, 321–326.

Ingold, D. J. (1998). The influence of Starlings on Flicker reproduction when both naturally excavated cavities and artificial nest boxes are available. Wilson Bulletin 110, 218–224.

Ishtiaq, F., Beadell, J. S., Baker, A. J., Rahmani, A. R., Jhala, Y. V., and Fleischer, R. C. (2006). Prevalence and evolutionary relationships of haematozoan parasites in native versus introduced populations of Common Myna Acridotheres tristis. Proceedings of the Biological Society of London – B. Biological Sciences 273, 587–594.
Prevalence and evolutionary relationships of haematozoan parasites in native versus introduced populations of Common Myna Acridotheres tristis.Crossref | GoogleScholarGoogle Scholar |

IUCN (1987). The IUCN position statement on translocation of living organisms. Introductions, re-introductions and re-stocking. Prepared by the Species Survival Commission in collaboration with the Commission on Ecology, and the Commission on Environmental Policy, Law and Administration. (International Union for Conservation of Nature (IUCN), Gland, Switzerland.)

IUCN (2012). Biological invasions: a growing threat to biodiversity, human health and food security. Policy recommendation for the Rio+20 process drafted by IUCN Species Survival Commission Invasive Species Specialist Group and Invasive Species Initiative. (International Union for Conservation of Nature (IUCN), Gland, Switzerland.) Available at http://cmsdata.iucn.org/downloads/policy_brief_on_invasive_and_alien_species_3.pdf [Verified 1 August 2012].

Jeschke, J. M., and Strayer, D. L. (2005). Invasion success of vertebrates in Europe and North America. Proceedings of the National Academy of Sciences of the United States of America 102, 7198–7202.
Invasion success of vertebrates in Europe and North America.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXks12ns78%3D&md5=189f6764b7605d4b8bc8222ab625808bCAS | 15849267PubMed |

Joseph, L. N., Maloney, R. F., and Possingham, H. P. (2009). Optimal allocation of resources among threatened species: a project prioritization protocol. Conservation Biology 23, 328–338.
Optimal allocation of resources among threatened species: a project prioritization protocol.Crossref | GoogleScholarGoogle Scholar | 19183202PubMed |

Kawakami, K., and Higuchi, H. (2003). Interspecific interactions between the native and introduced white-eyes in the Bonin Islands. Ibis 145, 583–592.
Interspecific interactions between the native and introduced white-eyes in the Bonin Islands.Crossref | GoogleScholarGoogle Scholar |

Keller, R. P., Lodge, D. M., and Finnoff, D. C. (2007). Risk assessment for invasive species produces net bioeconomic benefits. Proceedings of the National Academy of Sciences of the United States of America 104, 203–207.
Risk assessment for invasive species produces net bioeconomic benefits.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXjt1OisA%3D%3D&md5=a0583ea889c75b2ef63c31f6d8e4a0e7CAS | 17190819PubMed |

Koch, A. J., Martin, K., and Aitken, K. E. H. (2012). The relationship between introduced European Starlings and the reproductive activities of Mountain Bluebirds and Tree Swallows in British Columbia, Canada. Ibis 154, 590–600.
The relationship between introduced European Starlings and the reproductive activities of Mountain Bluebirds and Tree Swallows in British Columbia, Canada.Crossref | GoogleScholarGoogle Scholar |

Koenig, W. D. (2003). European Starlings and their effect on native cavity-nesting birds. Conservation Biology 17, 1134–1140.
European Starlings and their effect on native cavity-nesting birds.Crossref | GoogleScholarGoogle Scholar |

Komdeur, J. (1996). Breeding of the Seychelles Magpie Robin Copsychus sechellarum and implications for its conservation. Ibis 138, 485–498.
Breeding of the Seychelles Magpie Robin Copsychus sechellarum and implications for its conservation.Crossref | GoogleScholarGoogle Scholar |

Kumschick, S., and Nentwig, W. (2010). Some alien birds have as severe an impact as the most effectual alien mammals in Europe. Biological Conservation 143, 2757–2762.
Some alien birds have as severe an impact as the most effectual alien mammals in Europe.Crossref | GoogleScholarGoogle Scholar |

Lõhmus, A., and Remm, J. (2005). Nest quality limits the number of hole-nesting passerines in their natural cavity-rich habitat. Acta Oecologica 27, 125–128.
Nest quality limits the number of hole-nesting passerines in their natural cavity-rich habitat.Crossref | GoogleScholarGoogle Scholar |

Long, J. L. (1981). ‘Introduced Birds of the World.’ (Reed: Sydney.)

Lowe, S., Browne, M., Boudjelas, S., and De Poorter, M. (2000). ‘100 of the World’s Worst Invasive Alien Species – A selection from the Global Invasive Species Database.’ (Invasive Species Specialist Group (Species Survival Commission , International Union for Conservation of Nature (IUCN): Gland, Switzerland.) Available at http://www.issg.org/database/species/reference_files/100English.pdf [Verified 10 October 2013].

Lowe, K. A., Taylor, C. E., and Major, R. E. (2011). Do Common Mynas significantly compete with native birds in urban environments? Journal of Ornithology 152, 909–921.
Do Common Mynas significantly compete with native birds in urban environments?Crossref | GoogleScholarGoogle Scholar |

Lunney, D., Baker, J., Matthews, A., Waples, K., Dickman, C., and Cogger, H. (2007). Overabundant native vertebrates in New South Wales: characterising populations, gauging perceptions and developing an ethical management framework. In ‘Pest or Guest: The Zoology of Overabundance’. (Eds D. Lunney, P. Eby, P. Hutchings and S. Burgin.) pp. 158–173. (Royal Zoological Society of New South Wales: Sydney.)

MacGregor-Fors, I., Morales-Perez, L., Quesada, J., and Schondube, J. E. (2010). Relationship between the presence of House Sparrows (Passer domesticus) and Neotropical bird community structure and diversity. Biological Invasions 12, 87–96.
Relationship between the presence of House Sparrows (Passer domesticus) and Neotropical bird community structure and diversity.Crossref | GoogleScholarGoogle Scholar |

Mack, R. N., Simberloff, D., Lonsdale, W. M., Evans, H., Clout, M., and Bazzaz, F. A. (2000). Biotic invasions: causes, epidemiology, global consequences, and control. Ecological Applications 10, 689–710.
Biotic invasions: causes, epidemiology, global consequences, and control.Crossref | GoogleScholarGoogle Scholar |

Mahon, P. S. (2009). Targeted control of widespread exotic species for biodiversity conservation: the Red Fox (Vulpes vulpes) in New South Wales, Australia. Ecological Management & Restoration 10, S59–S69.
Targeted control of widespread exotic species for biodiversity conservation: the Red Fox (Vulpes vulpes) in New South Wales, Australia.Crossref | GoogleScholarGoogle Scholar |

May, R. M. (1994). Ecological science and the management of protected areas. Biodiversity and Conservation 3, 437–448.
Ecological science and the management of protected areas.Crossref | GoogleScholarGoogle Scholar |

Meyer, J. (2003). French Polynesia. In ‘Invasive Alien Species in the Austral Pacific Region: National Reports & Directory of Resources’. (Eds C. Shine, J. K. Reaser and A. T. Gutierrez.) pp. 22–34. (Global Invasive Species Program: Cape Town, South Africa.)

Morgan, D., Waas, J. R., and Innes, J. (2006). Do territorial and non-breeding Australian Magpies Gymnorhina tibicen influence the local movements of rural birds in New Zealand? Ibis 148, 330–342.
Do territorial and non-breeding Australian Magpies Gymnorhina tibicen influence the local movements of rural birds in New Zealand?Crossref | GoogleScholarGoogle Scholar |

Muñoz-Fuentes, V., Vila, C., Green, A. J., Negro, J. J., and Sorenson, M. D. (2007). Hybridization between White-headed Ducks and introduced Ruddy Ducks in Spain. Molecular Ecology 16, 629–638.
Hybridization between White-headed Ducks and introduced Ruddy Ducks in Spain.Crossref | GoogleScholarGoogle Scholar | 17257118PubMed |

Negro, J. J., Torres, M. J., and Godoy, J. A. (2001). RAPD analysis for detection and eradication of hybrid partridges (Alectoris rufa × A-graeca) in Spain. Biological Conservation 98, 19–24.
RAPD analysis for detection and eradication of hybrid partridges (Alectoris rufa × A-graeca) in Spain.Crossref | GoogleScholarGoogle Scholar |

Newson, S. E., Johnston, A., Parrott, D., and Leech, D. I. (2011). Evaluating the population-level impact of an invasive species, Ring-necked Parakeet Psittacula krameri, on native avifauna. Ibis 153, 509–516.
Evaluating the population-level impact of an invasive species, Ring-necked Parakeet Psittacula krameri, on native avifauna.Crossref | GoogleScholarGoogle Scholar |

Norman, F. I. (1990). Macquarie Island ducks – habitats and hybrids. Notornis 37, 53–58.

NSW Scientific Committee (2011). Predation by the ship rat on Lord Howe Island – key threatening process listing. (NSW Office of Environment and Heritage: Sydney.) Available at http://www.environment.nsw.gov.au/determinations/ShipRatLordHoweKTPListing.htm [Verified 4 May 2013].

Odling-Smee, L. (2005). Dollars and sense. Nature 437, 614–616.
Dollars and sense.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXhtVCjs7nI&md5=addb5114b1cc50234b9e4e445b1b4658CAS | 16193016PubMed |

Orchan, Y., Chiron, F., Shwartz, A., and Kark, S. (2013). The complex interaction network among multiple invasive bird species in a cavity-nesting community. Biological Invasions 15, 429–445.
The complex interaction network among multiple invasive bird species in a cavity-nesting community.Crossref | GoogleScholarGoogle Scholar |

Parsons, H., Major, R. E., and French, K. (2006). Species interactions and habitat associations of birds inhabiting urban areas of Sydney, Australia. Austral Ecology 31, 217–227.
Species interactions and habitat associations of birds inhabiting urban areas of Sydney, Australia.Crossref | GoogleScholarGoogle Scholar |

Paton, J. B., Storr, R., Delroy, L., and Best, L. (1992). Patterns to the distribution and abundance of Mallards, Pacific Black Ducks and their hybrids in South Australia in 1987. South Australian Ornithologist 31, 103–110.

Phillips, R. A. (2010). Eradications of invasive mammals from islands: why, where, how and what next? Emu 110, i–vii.
Eradications of invasive mammals from islands: why, where, how and what next?Crossref | GoogleScholarGoogle Scholar |

Pimental, D. (2011). ‘Biological Invasions: Economic and Environmental Costs of Alien Plant, Animal, and Microbe Species’, 2nd edn. (CRC Press: Boca Raton, FL.)

Poling, T. D., and Hayslette, S. E. (2006). Dietary overlap and foraging competition between Mourning Doves and Eurasian Collared-Doves. Journal of Wildlife Management 70, 998–1004.
Dietary overlap and foraging competition between Mourning Doves and Eurasian Collared-Doves.Crossref | GoogleScholarGoogle Scholar |

Rhymer, J. M., and Simberloff, D. (1996). Extinction by hybridization and introgression. Annual Review of Ecology and Systematics 27, 83–109.
Extinction by hybridization and introgression.Crossref | GoogleScholarGoogle Scholar |

Rhymer, J. M., Williams, M. J., and Braun, M. J. (1994). Mitochondrial analysis of gene flow between New Zealand Mallards (Anas platyrhynchos) and Grey Ducks (A. superciliosa). Auk 111, 970–978.
Mitochondrial analysis of gene flow between New Zealand Mallards (Anas platyrhynchos) and Grey Ducks (A. superciliosa).Crossref | GoogleScholarGoogle Scholar |

Richardson, D. M., Pyšek, P., Rejmánek, M., Barbour, M. G., Panetta, D., and West, C. J. (2000). Naturalization and invasion of alien plants: concepts and definitions. Diversity & Distributions 6, 93–107.
Naturalization and invasion of alien plants: concepts and definitions.Crossref | GoogleScholarGoogle Scholar |

Roberts, D. G., Baker, J., and Perrin, C. (2011). Population genetic structure of the endangered Eastern Bristlebird, Dasyornis brachypterus; implications for conservation. Conservation Genetics 12, 1075–1085.
Population genetic structure of the endangered Eastern Bristlebird, Dasyornis brachypterus; implications for conservation.Crossref | GoogleScholarGoogle Scholar |

Salafsky, N., Salzer, D., Stattersfield, A. J., Hilton-Taylor, C., Neugarten, R., Butchart, S. H., Collen, B., Cox, N., Master, L. L., O’Connor, S., and Wilkie, D. (2008). A standard lexicon for biodiversity conservation: unified classifications of threats and actions. Conservation Biology 22, 897–911.
A standard lexicon for biodiversity conservation: unified classifications of threats and actions.Crossref | GoogleScholarGoogle Scholar | 18544093PubMed |

Soos, C., Padilla, L., Iglesias, A., Gottdenker, N., Bedon, M. C., Rios, A., and Parker, P. G. (2008). Comparison of pathogens in broiler and backyard chickens on the Galapagos Islands: implications for transmission to wildlife. Auk 125, 445–455.
Comparison of pathogens in broiler and backyard chickens on the Galapagos Islands: implications for transmission to wildlife.Crossref | GoogleScholarGoogle Scholar |

Strubbe, D., and Matthysen, E. (2007). Invasive Ring-necked Parakeets Psittacula krameri in Belgium: habitat selection and impact on native birds. Ecography 30, 578–588.

Strubbe, D., and Matthysen, E. (2009). Experimental evidence for nest-site competition between invasive Ring-necked Parakeets (Psittacula krameri) and native Nuthatches (Sitta europaea). Biological Conservation 142, 1588–1594.
Experimental evidence for nest-site competition between invasive Ring-necked Parakeets (Psittacula krameri) and native Nuthatches (Sitta europaea).Crossref | GoogleScholarGoogle Scholar |

Strubbe, D., Matthysen, E., and Graham, C. H. (2010). Assessing the potential impact of invasive Ring-necked Parakeets Psittacula krameri on native Nuthatches Sitta europaea in Belgium. Journal of Applied Ecology 47, 549–557.
Assessing the potential impact of invasive Ring-necked Parakeets Psittacula krameri on native Nuthatches Sitta europaea in Belgium.Crossref | GoogleScholarGoogle Scholar |

Strubbe, D., Shwartz, A., and Chiron, F. (2011). Concerns regarding the scientific evidence informing impact risk assessment and management recommendations for invasive birds. Biological Conservation 144, 2112–2118.
Concerns regarding the scientific evidence informing impact risk assessment and management recommendations for invasive birds.Crossref | GoogleScholarGoogle Scholar |

Szabo, J. K., Khwaja, N., Garnett, S. T., and Butchart, S. H. M. (2012). Global patterns and drivers of avian extinctions at the species and subspecies level. PLoS ONE 7, e47080.
Global patterns and drivers of avian extinctions at the species and subspecies level.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhsFKjt7nM&md5=57dffe16edfaffbaaa2af92ca474cb47CAS | 23056586PubMed |

Tejedor, M. T., Monteagudo, L. V., Mautner, S., Hadjisterkotis, E., and Arruga, M. V. (2007). Introgression of Alectoris chukar genes into a Spanish wild Alectoris rufa population. Journal of Heredity 98, 179–182.
Introgression of Alectoris chukar genes into a Spanish wild Alectoris rufa population.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXmvF2js74%3D&md5=9aaa295c28867ac82e9c3101bf2bdd13CAS | 17395601PubMed |

Thibault, J. C., Martin, J. L., Penloup, A., and Meyer, J. Y. (2002). Understanding the decline and extinction of monarchs (Aves) in Polynesian islands. Biological Conservation 108, 161–174.
Understanding the decline and extinction of monarchs (Aves) in Polynesian islands.Crossref | GoogleScholarGoogle Scholar |

Tilman, D., May, R. M., Lehman, C. L., and Nowak, M. A. (1994). Habitat destruction and the extinction debt. Nature 371, 65–66.
Habitat destruction and the extinction debt.Crossref | GoogleScholarGoogle Scholar |

Tindall, S. D., Ralph, C. J., and Clout, M. N. (2007). Changes in bird abundance following Common Myna control on a New Zealand island. Pacific Conservation Biology 13, 202–212.

Tracey, J. P., Lukins, B. S., and Haselden, C. (2008). Hybridisation between Mallard (Anas platyrhynchos) and Grey Duck (A. superciliosa) on Lord Howe Island and management options. Notornis 55, 1–7.

Troetschler, R. G. (1976). Acorn Woodpecker breeding strategy as affected by Starling nest-hole competition. Condor 78, 151–165.
Acorn Woodpecker breeding strategy as affected by Starling nest-hole competition.Crossref | GoogleScholarGoogle Scholar |

United Nations (1992). ‘Convention on Biological Diversity.’ (United Nations.) Available at http://www.cbd.int/doc/legal/cbd-en.pdf [Verified 3 October 2013].

US Fish and Wildlife Service (2011). ‘Recovery Plan for Hawaiian Waterbirds.’ 2nd revision. (US Fish and Wildlife Service: Portland, OR.)

Vierling, K. T. (1998). Interactions between European Starlings and Lewis’ Woodpeckers at nest cavities. Journal of Field Ornithology 69, 376–379.

Warner, R. E. (1968). The role of introduced diseases in the extinction of the endemic Hawaiian avifauna. Condor 70, 101–120.
The role of introduced diseases in the extinction of the endemic Hawaiian avifauna.Crossref | GoogleScholarGoogle Scholar |

WHO (2012). Avian influenza A (H5N1) infection in humans. New England Journal of Medicine 353, 1374–1385.

Wikelski, M., Foufopoulos, J., Vargas, H., and Snell, H. (2004). Galapagos birds and diseases: invasive pathogens as threats for island species. Ecology and Society 9, 5.

Williamson, P., and Gray, L. (1975). Foraging behavior of the Starling (Sturnus vulgaris) in Maryland. Condor 77, 84–89.
Foraging behavior of the Starling (Sturnus vulgaris) in Maryland.Crossref | GoogleScholarGoogle Scholar |

Wilson, K. A., McBride, M. F., Bode, M., and Possingham, H. P. (2006). Prioritizing global conservation efforts. Nature 440, 337–340.
Prioritizing global conservation efforts.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XitlKguro%3D&md5=35e9631b6cffef9a266b3c88cfb3775aCAS | 16541073PubMed |

Woodworth, B. L. (1997). Brood parasitism, nest predation, and season-long reproductive success of a tropical island endemic. Condor 99, 605–621.
Brood parasitism, nest predation, and season-long reproductive success of a tropical island endemic.Crossref | GoogleScholarGoogle Scholar |

Yom-Tov, Y., Hatzofe, O., and Geffen, E. (2012). Israel’s breeding avifauna: a century of dramatic change. Biological Conservation 147, 13–21.
Israel’s breeding avifauna: a century of dramatic change.Crossref | GoogleScholarGoogle Scholar |