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THE BIRDS AND THE CONTINENTS
am greatly indebted to many individuals Early versions of the Introduc
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1st egg activity adaptive adult allofed allofeeding allogrooming ancestors appear Archaeopteryx Australia avian behavior bill birds body temperature brain breeding brood Budgerigars Carmen and Cosimo Cassandra cells chicks clutch Cockatielian Cockatiels copulation courtship Cretaceous Cyrano domestic fowl early ectothermic egg-care eggs embryos enclosure floor endothermy evolution evolutionary example feather-picking feathers feeding female Ferdinand Flavia flight follicles follicular foraging function gland grooming hatching heat homeothermic hormones hypothalamus increase incubation incubatory period interactions Isabella later lizards male mammals mate membrane metabolic Miocene morning movements nest nestbowl nestlings neural neurons nidicolous nidifugous night occur oocytes ovarian ovary oviduct oviposition ovulation pair bond parents parrots passerines pattern Peach-faced Lovebirds pecked perch Petra and Ramses predators primitive pro-aves probably prolactin relatively reproductive reptiles responses Rock Pigeons sexual shell species stage suggested surface tion Titus usually vertebrates visual vocal yolk young Zenobia