The birds are minor characters in Oswald.
The birds are residents of Big City, seen in the backgrounds of nearly every episode. The majority of the birds are primary colors (red, blue or yellow). They do not speak, and normally do not play prominent roles (though "The Birdhouse" focuses on Oswald building a house for them).
The birds all have similar shapes. They have circular heads, black eyes and orange beaks. The birds are either red, blue or yellow. They do not appear to have feet.
The birds appear in many episodes of Oswald. Their first appearance was in "Rollerskating," in which they are the first characters to appear.