I think Some birds have long thin claws so theycan scratch away bark and stuff to get their food
so they can catch their prey
Bills or beaks suitable for kinds of food they eat. Some birds like Eagles have hooked beaks to tear the flesh of their prey ; some birds have short,thin beaks to capture insects ; and some birds have short, thick beaks to open seeds. some birds have even long,thin beaks for probing flowers for nectar or searching the soft mud for worms and shellfish.
birds with really thin bones
The scientific name for the genus of birds which the four species of avocet belong to is the genus "Recurvirostra" which is due to them having long legs and thin, long, upturned beaks.
yes. they are thin and pink, kind of like the lips on a cat.
hawks and other birds of prey have hooked beaks ideal for ripping and tearing prey, humming birds have long beaks for getting at insects and nectar.
The birds eat different types of foods
As there is no unit to declare 'sharpness', I'll simply say: very sharp. Wolf claws, and canine claws in general, are not as thin and sharp as feline claws, yet thicker and stronger. They can tear apart rabbits and deer.
It depends what type of crab they are. Most have claws and are small, but there are some that are huge and bigger than an average man.
Different birds require different beaks and mouth-parts depending on their diet. Birds that eat meat need heavy, powerful beaks, nectar-feeding birds need long, thin beaks, etc. Beaks can also be used to attract a mate.
long thin snouts to catch fish
Feathers
thin bones, muscles and feathers