
TY  - JOUR
A1  - Fjeldsa, J 
T1  - Social behaviour and displays of the Hoary-headed Grebe <I>Poliocephalus poliocephalus</I>
JF  - Emu
JO  - EMU
Y1  - 1983
VL  - 83
IS  - 3
SP  - 129
EP  - 140
KW  - 
UR  - https://doi.org/10.1071/MU9830129 
N2  - The Hoary-headed Grebe Poliocephalus poliocephalus specialized in feeding on an unpredictable though at times very abundant supply of tiny arthropods. It may be more gregarious than any other grebe, with less developed agonistic behaviour. A strong tendency to cluster may facilitate food-location and reduce predation. Big roosts where the individuals clump densely are formed by night. Courtship rituals are simple, and similar to those of the New Zealand Dabchick P. rufopectus. The two species form a distinct evolutionary line, with the Neotropical White-tufted Grebe Rollandia rolland and Great Grebe Podiceps major as the nearest relatives. 
ER  -

