Birds are a group of warm-blooded vertebrates constituting the class Aves /ˈeɪviːz/, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. B
FROM THIS CATEGORY
We’ll design for you new Vector files, for free!
Because at Vector free files, we’ve built a world that works,
just the way it should!