... of social defeat in a territorial bird (Parus major) selected for different coping styles . Physiol. Behav.   73 , 427 - 433 . 10.1016/S0031-9384(01)00492-9 Crick , H. Q. P. ( 1992 ). Load-lightening in cooperatively breeding birds and the cost of reproduction . Ibis   134 , 56 - 61...

... the effects of nest use and group size on roosting energy costs. These 50 g cooperatively breeding passerine birds of outback Australia breed from late winter to early summer and roost in huddles of up to 20 in single-chambered nests. We measured babbler metabolism at three ecologically relevant temperatures...