Granny Bird is Big Bird's paternal grandmother, who first appeared in Episode 0030. She is almost identical in appearance to her grandson except for her clothes, the gray feathers in her forehead, faded eyelids, and eyeglasses. In Episode 3006, it is revealed that Granny Bird is Big Bird's grandmother on his father's side.

The puppet used for Granny Bird is usually a spare Big Bird puppet. During Caroll Spinney's tenure as Big Bird, Spinney also performed Granny Bird.