Key to AvesEdit
- 6: Nocturnal and carnivorous, feeding mostly on insects and small rodents; generally fly almost silently; Feathers have few radiates and longer pennulum; Large, tubular shaped eyes unable to move; Ear placement asymmetrical. Owls.
- 7: Nocturnal or diurnal with various feeding habits; Generally make noise during flight; Small, round eyes.
- Strigidae: Inner toe shorter than third toe, which has a smooth edge; Circular facial disk; Four notches present in sternum which is not fused to the furcula. True owls.
- Tytonidae: Inner toe is the same size as other toes and has a pectinate claw; Heart-shaped facial disk; Two notches present in sternum which is fused to the furcula. Barn owls.
- 8: Strong, curved bill; Two clawed toes face forward and two clawed toes face backward; Generally vividly multi-colored and eat seeds, nuts, fruit, buds, or other plant material.
- 9: Various bill shapes, but generally not strongly curved downward; Various dactyly, but generally not two claws forward and two backward.
- Cacatuoidea (cockatoos), 21 species
- Psittacoidea (true parrots), 330 species
- Strigopoidea (New Zealand parrots), 9 species (excluding Kakapo- flightless)
- Accipitridae (eagles, hawks, old world vultures)
- Pandion haliaetus (Osprey), 1 species
- Falconidae (Falcons & caracaras), ~60 species
- Sagittariius serpentarius (Secretarybird), 1 species
- Cathartidae (New World vulture), 7 species
- Diomedeidae (albatrosses), 21 species (debated)
- Hydrobatidae (storm petrels), 7 species
- Pelecanoididae (diving petrels), 4 species
- Procellariidae, ~70 species