Interesting theory......I would say that birds have wings mainly as an aid to almost evrything they do. Carnivorous birds need their wings to swoop down on smaller birds. All birds( that have wings and are capable of flying) use their wings to evade predators and humans. They use them to hunt, to migrate, to collect materials for their nests....many things would not be available to brids if they did not have wings, and most of those things neccesary, hence the answer. They just need them.
Not all animals have beaks or bills. Think of dogs, cats and cattle. Definitely animals, and definitely not a beak in sight.
The beak of a pigeon is smaller than the beak of a hawk.
Birds
Herons , Hawk , Kingfisher
The Oystercatcher (family Haematopodidae, with a single genus, Haematopus) is a bird with a slender beak.
In Aesop's tale of The Fox and The Crow the fox saw that the crow had a piece of cheese in its beak.
That's what they are called.....
All birds have that, it is to give their beak some flexibility. It's not a hole, it is covered with skin. If the beak was solid, when they opened their mouth it would cut into their throat. With the gap there, the sides of the beak can move past the head and let them open their beak.
If it has a beak they tap until the egg cracks and they toddle out.
there big yellow beak
They stick their beak under the water and fill their beaks with water. Then they filter it with the special part in their beak leaving water bugs or animals.
animals use their fangs,beak,sharp teeth and claws