tree swallow

/tri ˌswɑloʊ/

Other forms: tree swallows

Definitions of tree swallow

1. noun

   bluish-green-and-white North American swallow; nests in tree cavities
   synonyms: Iridoprocne bicolor, white-bellied swallow

   type of:

   swallow

   small long-winged songbird noted for swift graceful flight and the regularity of its migrations
2. noun

   of Australia and Polynesia; nests in tree cavities
   synonyms: Hirundo nigricans, tree martin

   type of:

   swallow

   small long-winged songbird noted for swift graceful flight and the regularity of its migrations