bluebird

UK: /ˈbluːˌbɜːd/ US: /ˈbluˌbɝd/ ,(blo̅o̅′bûrd′)

WordReference Random House Learner's Dictionary of American English © 2025

blue•bird /ˈbluˌbɜrd/   n. [countable]

1. Birds a North American songbird of the thrush family, the male of which is mostly or entirely blue.

WordReference Random House Unabridged Dictionary of American English © 2025

blue•bird  (blo̅o̅′bûrd′), n. 

1. Birds 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.
2. Birds See fairy bluebird. 
3. (usually cap.) a member of Camp Fire, Inc., who is between the ages of six and eight.

• blue + bird 1680–90

Collins Concise English Dictionary © HarperCollins Publishers::

bluebird / ˈbluːˌbɜːd/ noun

1. any North American songbird of the genus Sialia, having a blue or partly blue plumage: subfamily Turdinae (thrushes)
2. fairy bluebird ⇒ any songbird of the genus Irena, of S and SE Asia, having a blue-and-black plumage: family Irenidae