Palmate, totipalmate, or lobate feet
Ansiopalmate
Have a light-colored under-belly
Sharp talons or claws to hold onto slippery prey
Good sense of smell
Palmate, semipalmate, totipalmate, syndactyl, or raptorial feet
Long tongue
Specialized beak
Fast
Pointed angular beak
Short, pointed beaks
Quiet feathers
Pamprodactyl or anisodactyl feet
Anisodactyl
Hooked wings
Anisodactyl, semipalmate, or zygodactyl feet
Bald heads
Zygodactyl feet
Beak that crosses over
Able to filter seawater
Broad beaks
Have shiny structural feathers
Variety of foot types
Strong sharp talons or claws to tear or hold prey
Long skinny beaks
Long split tongue
Hooked beak
Pointed beaks
Stiff tail feathers
Extensible gular pouch
Small bodied
Strong beaks
Have dark-colored under-belly
Large mouths that can open wide
Oiled feathers
Long strong beaks
Only come to land to nest/mate
Raptorial, syndactyl, or zygodactyl
Raptorial or zygodactyl
