- any of several small North American songbirds of the genus Sialia, having predominantly blue plumage, as the eastern S. sialis, which has a blue back and a reddish-brown breast.
- fairy bluebird.
- a member of Camp Fire, Inc., who is between the ages of six and eight.
- any North American songbird of the genus Sialia, having a blue or partly blue plumage: subfamily Turdinae (thrushes)
- any songbird of the genus Irena, of S and SE Asia, having a blue-and-black plumage: family Irenidae
- any of various other birds having a blue plumage
