Avian ProteinsBirdsPasseriformesSongbirdsAnimal MigrationFeathersCharadriiformesFlight, AnimalPsittaciformesAnimals, WildParrotsAnseriformesChickensRaptorsGalliformesNesting BehaviorFalconiformesVocalization, AnimalFinchesBeakSparrowsGeeseDucksColumbidaeCloacaBird Fancier's LungPoultry DiseasesCrowsPhylogenySpecies SpecificitySpheniscidaeReptilesHaemosporidaPoultryPalaeognathaeFeeding BehaviorSeasonsBiological EvolutionEcosystemDinosaursCoturnix