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;Delichon urbica | ;Delichon urbica | ||
| − | [[Image:Northern_House_Martin.jpg|thumb| | + | [[Image:Northern_House_Martin.jpg|thumb|550px|right|Photo by Raydes]] |
==Identification== | ==Identification== | ||
Photographed: Petra (Lesvos-Greece). | Photographed: Petra (Lesvos-Greece). | ||
| − | + | The characters of the race: upperparts are bluish-black with a dark blue sheen. The white rump is less extensive than on lagopoda. The longest upper tail coverts are wholly black or are only pale at the bases. The white rump and upper tail covert feathers sometimes have dark central shafts. The throat, breast, flanks and undertail are white, rarely showing a brownish-grey cast. The axillaries are brownish-grey. The tail fork is deeper than in lagopoda, about 15-25 mm. Wing length of males is 107-118mm (110.7), of females 104-115 mm (111.6). | |
| − | + | Adult glossy blueish black above, and duller black flight feathers. Tail blue and forked. Has distinctive white rump in flight. Immature duller and lacks shiny sheens. | |
| + | ==Distribution== | ||
| + | ==Taxonomy== | ||
| + | ==Habitat== | ||
| + | ==Behaviour== | ||
Gregarious, breeding colonially on buildings, under eaves and sometimes in cliffs. Nest of mud. Widespread and sometimes common, recent evidence of decline. | Gregarious, breeding colonially on buildings, under eaves and sometimes in cliffs. Nest of mud. Widespread and sometimes common, recent evidence of decline. | ||
Revision as of 15:26, 27 June 2007
- Delichon urbica
Identification
Photographed: Petra (Lesvos-Greece). The characters of the race: upperparts are bluish-black with a dark blue sheen. The white rump is less extensive than on lagopoda. The longest upper tail coverts are wholly black or are only pale at the bases. The white rump and upper tail covert feathers sometimes have dark central shafts. The throat, breast, flanks and undertail are white, rarely showing a brownish-grey cast. The axillaries are brownish-grey. The tail fork is deeper than in lagopoda, about 15-25 mm. Wing length of males is 107-118mm (110.7), of females 104-115 mm (111.6). Adult glossy blueish black above, and duller black flight feathers. Tail blue and forked. Has distinctive white rump in flight. Immature duller and lacks shiny sheens.
Distribution
Taxonomy
Habitat
Behaviour
Gregarious, breeding colonially on buildings, under eaves and sometimes in cliffs. Nest of mud. Widespread and sometimes common, recent evidence of decline.
Originally posted by seb_seb
Bird Song
<flashmp3>Delichon urbica (song).mp3</flashmp3>
Listen in an external program
