They eat worms
NO
Because it gives Shade, Shelter to birds and useful for different medicines.
the tail of birds is really useful during their flight and hence is the 5th limb
all of them they help keep the useful ones alive in a food chain which is useful to us
they were used as meat to eat.
By destroying large numbers of harmful insects.
They keep them warm and for most of them ables them to fly.
For humans, not particularly. But there are plenty of birds that eat them.
because it helps them more on the studies of birds.
birds are vry useful to us (eg) fire flies ,
Yes in fact, the green bird is like a boomerang. when you take off you will have to left-click on your mouse to make it like a boomerang these birds are very useful and his name is parabeak
Because they are just like birds they make nests in trees x