From Opus

Streptoprocne semicollaris

[edit] Identification

With 22cm a large Swift.

• Black-brown plumage
• Diagnostic white nape patch
• Long, broad wings
• Heavy body
• Square tail, looking rounded when spread

[edit] Similar Species

White-collared Swift and Biscutate Swift.

[edit] Distribution

Endemic to W Mexico, recorded in Belize.
Locally common and not globally threatened.

[edit] Taxonomy

Has been placed as only species in genus Semicollum or together with Great Dusky Swift in genus Aerornis.
Monotypic.

[edit] Habitat

Found in the mountains of West Mexico around gorges, cliffs, high crags, up to 3600m. Usually over pine-oak forest, tropical deciduous forest and scrub. Sometimes seen over coastal slopes.

[edit] Behaviour

Feeds on insects, taken in flight.
Breeds in May in small colonies in caves. Builds a nest with plant material and mud, sometimes no nest at all. Lays two eggs.
Resident with only little movement.

[edit] External Links