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Black Swift

From Opus

Alternative name: American Black Swift

Photo © by Glen TepkeMcArthur-Burney Falls Memorial State Park, Shasta County, California, USA, July 2008
Cypseloides niger

Contents

[edit] Identification

JuvenilePhoto © by Glen TepkeMcArthur-Burney Falls Memorial State Park, Shasta County, California, USA, July 2008
Juvenile
Photo © by Glen Tepke
McArthur-Burney Falls Memorial State Park, Shasta County, California, USA, July 2008

A fairly large (15-18 cm (6-7.25 ins) in the nominate form of West Indies) black swift with slightly notched and relatively long tail.
At close range, white on forehead and brows may be visible.
The body is rather stocky, the wings relatively broad.

[edit] Geographic variation

Birds in the Caribbean average smaller with more deeply forked tail than birds in the USA.

[edit] Distribution

The Black Swift is distributed from SE Alaska through SW USA, and Mexico to Costa Rica, and in the West Indies to Trinidad and Tobago to Guyana. Even southern populations (e.g., in the Lesser Antilles) are migratory, presumably wintering in South America, while the species is present year round in Hispaniola and Jamaica.
A highly migratory species, but the definitive wintering grounds are still unknown. Recorded in winter in Colombia.
Not globally threatened, abundant in parts of its range, uncommon in others.

[edit] Taxonomy

They (or some individuals) may appear darker than shownArtwork © by alaskabirder
They (or some individuals) may appear darker than shown
Artwork © by alaskabirder

Forms a superspecies with White-chested Swift, Rothschild's Swift and Sooty Swift.

[edit] Subspecies

It's considered to have three subspecies[1]:

  • C.n. borealis:
  • From the South-West USA north over Western Canada to Alaska, larger than other subspecies
  • C.n. costaricensis:
  • C.n. niger:

[edit] Habitat

In the north of its range in a variety of open highland habitat. In the south around montane evergreen forest, also secondary growth. In eastern Caribbean, they often seem absent in good weather due to hunting very high, but in bad weather may hunt all the way down to sea level.

[edit] Behaviour

Photo © by NJLarsenEmerald Pool, Dominica, July 2015Photo taken from a spot visited by probably more than 1000 tourists a week, but nest difficult to see
Photo © by NJLarsen
Emerald Pool, Dominica, July 2015
Photo taken from a spot visited by probably more than 1000 tourists a week, but nest difficult to see

Like other Swifts highly gregarious, sometimes seen in flocks numbering hundreds or thousands of birds, often together with other Swift species. May travel long distances between nestplaces and feeding grounds.

[edit] Diet

Feeds on various insects, eg. wasps, bees or ants, taken in flight.

[edit] Breeding

Nests in June in the USA, earlier (May) in the south. Often near waterfalls. Needs darkness, water, inaccessibility, a good flyway, high relief and a rock niche to build its pad of moss and twigs, bound with mud. Lays one egg. Copulation takes place in flight, like in other Swift species.
Incubation by both adults, takes about 24 days. There are long periods between feeding and the young swift grows slowly. Fledging takes place at about 44 days.

[edit] Vocalisation

Call: a rapid, repetitive ci-chi-chi-chit

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2018. The eBird/Clements checklist of birds of the world: v2018. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Whatbird.com

[edit] External Links

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