What is "chelidon urbica"

Swallow \Swal"low\, n. [OE. swalowe, AS. swalewe, swealwe; akin to D. zwaluw, OHG. swalawa, G. schwalbe, Icel. & Sw. svala, Dan. svale.]

1. (Zo["o]l.) Any one of numerous species of passerine birds of the family Hirundinid[ae], especially one of those species in which the tail is deeply forked. They have long, pointed wings, and are noted for the swiftness and gracefulness of their flight.

   Note: The most common North American species are the barn swallow (see under Barn), the cliff, or eaves, swallow (see under Cliff), the white-bellied, or tree, swallow ( Tachycineta bicolor), and the bank swallow (see under Bank). The common European swallow ( Chelidon rustica), and the window swallow, or martin ( Chelidon urbica), are familiar species.

2. (Zo["o]l.) Any one of numerous species of swifts which resemble the true swallows in form and habits, as the common American chimney swallow, or swift.

3. (Naut.) The aperture in a block through which the rope reeves.
   --Ham. Nav. Encyc.

   Swallow plover (Zo["o]l.), any one of several species of fork-tailed ploverlike birds of the genus Glareola, as G. orientalis of India; a pratincole.

   Swallow shrike (Zo["o]l.), any one of several species of East Indian and Asiatic birds of the family Artamiid[ae], allied to the shrikes but similar to swallows in appearance and habits. The ashy swallow shrike ( Artamus fuscus) is common in India.

   Swallow warbler (Zo["o]l.), any one of numerous species of East Indian and Australian singing birds of the genus Dic[ae]um. They are allied to the honeysuckers.

Martin \Mar"tin\, n. [F. martin, from the proper name Martin. Cf. Martlet.] (Zo["o]l.) One of several species of swallows, usually having the tail less deeply forked than the tail of the common swallows. Note: The American purple martin, or bee martin ( Progne subis or Progne purpurea), and the European house martin, or window martin ( Hirundo urbica or Chelidon urbica), are the best known species. Bank martin.

1. The bank swallow. See under Bank.

2. The fairy martin. See under Fairy. Bee martin.

   1. The purple martin.

   2. The kingbird.

      Sand martin, the bank swallow.