Appearance:

All black swift with small white throat patch. Very difficult to separate from Pallid swift and Plain Swift. Pallid Swift; brownish plumage tone (best seen against darker background), bigger throat-patch than swift, scale pattern on body more prominent, wing-tips slightly rounded, "saddle" darker than wings, and more contrast between darker outer primaries and inner. Plain Swift; throat patch smaller and more diffuse than swift, wings and body more slender, tail noticeably deeper forked.

Sound:

A shrilling trill "zreeeee" of about 1 -2 seconds length, gradually rising in pitch with accentuated firs half, then falling from the middle of phrase. Often continued with a dry lower pitched "trrrrrr" before calling again. Very vocal at breeding area, and often a flock will call together. Despite being quite similar to Pallid Swift, the call is probably the best field character to separate the two. Pallid puts the stress on the ending of the call, followed by a quick fall in pitch (dynamics like moaning with a quick release). Plain Swift calls similar to Common Swift, but differs in slightly fluctuating pitch during the call, and a loss of resonance towards the ending (thinner sounding).

Song/contact call:

Distribution:

Wikipedia: map (se also Xeno-canto below)

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

Appearance:

Light grey upperparts, black wings and tail with white patches, white underparts and throat. Broad, black eyestripe not reaching above highest point of bill. Bill long and medium heavy (not as heavy as in Lesser GS). White patch at base of primaries varies according to subspecies. Black part of tail most narrow at base. Juveniles less pure in colour, with faintly barred underparts and buff fringes to greater coverts.

Sound:

Alarm call very harsh, nasal and noisy. Dry and not as deep or resonant as crows. Song varied. During breeding season a varied subdued song is heard from both sexes. Territorial call before breeding starts is simple, loud and resonant. Consisting of pleasant sounding single or double syllables, with well defined pauses and peculiar harmonics.

Territorial call/song:

Distribution:

Xeno-canto: map

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

Sounds:Recorded by Jarek Matusiak,http://www.xeno-canto.org ,CC license