Bird DiseasesBirdsPasseriformesSongbirdsAnimal MigrationFeathersCharadriiformesFlight, AnimalPsittaciformesAnimals, WildParrotsAnseriformesChickensRaptorsGalliformesNesting BehaviorFalconiformesVocalization, AnimalFinchesBeakSparrowsGeeseDucksColumbidaeCloacaBird Fancier's LungPoultry DiseasesCrowsPhylogenySpecies SpecificitySpheniscidaeReptilesHaemosporida