The Collaborative International Dictionary of English v.0.48:

Thunderbird \Thun"der*bird`\, n. (Zool.)
   An Australian insectivorous singing bird (Pachycephala
   gutturalis). The male is conspicuously marked with black and
   yellow, and has a black crescent on the breast. Called also
   white-throated thickhead, orange-breasted thrust,
   black-crowned thrush, guttural thrush, and
   black-breasted flycatcher.
   [1913 Webster]