Yes, wild birds of many varieties are eaten all over the world. The domestic birds that are commonly eaten in most cultures, like chickens and turkeys were once wild birds. The chicken was probably domesticated about 8,000 years ago.
sometimes they will
Birds such as robins, cedar waxwings, and various species of thrushes are known to eat cranberries from the wild. These birds are attracted to the bright red color and tart taste of the berries.
Yes they sometimes eat.
poo
Yes many birds in the wild life eat each other
Nearly all domesticated birds do, but some wild birds eat berries and other things.
yes,many songbirds eat them.
Yes, wild birds can eat cranberries. Just last week, I put out some on my feeder and on the floor, and some birds eat it, and the squirrels and chipmunks all gobble up the rest on the floor.
some do
Yes
yes
Birds of prey, Kestrals for example, wild cats, fox.