No, but many understand each others alarm calls.
All birds have feathers and birds are the only animals that do!
only the boy birds. They are called spurs they are half way up there leg and there is one one each leg. they are used for defending there hens from other boy birds.
Birds that you see around in the daytime have phenomenal color vision. Birds see color not only better than humans, but they see color in such a superior way that we humans cannot even begin to understand it. Pretty much all daytime birds can see blue perfectly. Nighttime birds, like owls, are most likely colorblind, though.
Yes, a penguin has vertebrae as do all other birds.
i dont know you will have to look at how much each bird is and add them all together and see how much they all are or just buy less than 7 birds because 7 birds cause alot of poop and mess
There are a great many different species of birds that coexist. Finches, robins, and blue birds all coexist with each other for example.
because they understand each other not only they even all relations are based on understanding each other this is a true fact which i have experianced
Because birds like to mimic each other or things(like humans) that is why parrots can talk.
By actions
To an extend yes, aggresion is easy to detect for birds regardless of their species, and the songs and calls of birds will certainly help birds who look similar tell each other apart. As an example, in a dense colony of breeding birds, an individual may follow the call of its mate to locate its own nest and egg in a very crowded area. All birds may use each other as centuries, with all birds taking for cover when anothers alarm call (the sound made when in danger or distress) is heard, this is most notable in thrushes as a blackbirds alarm call is sharp and easily heard in the area at risk.
While not all birds can fly, there are other things that they do have in common. All birds have feathers, lightweight skeletons, beaks, and all lay eggs.Wings
All birds have wings
All birds have feathers and birds are the only animals that do!
Spray what? Highly unlikely as even being sick is all but impossible for most birds.
Not all times if it has these points 1 love sharing 2 understand each other 3 sharing points
Nearly all domesticated birds do, but some wild birds eat berries and other things.
Well, not all birds are herbivore like a vulture, vultures eat dead things hawks eat other birds so no not ALL birds are herbivores