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White-naped Swift

Streptoprocne semicollaris

The White-naped Swift, known scientifically as Streptoprocne semicollaris, stands as a majestic figure among its kin. It is the largest of the New World swifts and vies with the Purple Needletail for the title of the largest swift worldwide. This avian marvel is cloaked in brown-black plumage, with a lustrous blue gloss adorning its back, and sports a distinctive white crescent upon its nape, lending it its name.

Identification Tips

When observing this swift, one notes its considerable size, ranging from 20.5 to 25 cm in length. The White-naped Swift can be distinguished from its relatives by its fairly squared-off tail, which may occasionally appear slightly notched in flight. The white crescent on the nape is a key identifier, contrasting with the absence of white on the bird's underside—a feature setting it apart from the similar White-collared Swift, which boasts a complete white collar and a more pronouncedly notched tail.

Habitat

The White-naped Swift is a creature of the wild highlands, favoring the dramatic landscapes of cliff faces, deep river gorges, and towering crags. It thrives in pine-oak forests, tropical deciduous forests, and areas of second-growth scrub.

Distribution

This swift's realm is primarily within the western and central regions of Mexico, with a solitary record at the border of Guatemala. It is typically found at elevations between 1,500 and 3,000 meters, though it has been known to venture down to sea level on rare occasions.

Behaviour

The White-naped Swift is a sociable bird, often found in breeding colonies that can number up to 200 individuals. It has been observed roosting in the company of other swift species and is known to forage in groups, sometimes venturing several miles from its breeding site. Its flight is powerful, fast, and direct, and it is adept at ascending thermals to impressive heights.

Song & Calls

While solitary individuals may be silent, groups of White-naped Swifts are quite vocal. Their call, a repetitive "cree-cree-cree," can be heard both in flight and while perched within the nesting cave.

Breeding

The nest of the White-naped Swift is a simple affair—a shallow depression in dry sand, often devoid of any additional materials or saliva. The birds are selective about the soil consistency for their nests, which are typically located on ledges within caves, away from the main chamber. Two white eggs are the norm, though the intricacies of their brooding behavior remain a mystery.

Diet and Feeding

In flight, the White-naped Swift captures a variety of flying insects, including beetles, bees, and flying ants, showcasing its aerial agility and precision.

Conservation status

The White-naped Swift is currently classified as Least Concern by the IUCN, indicating a stable population without immediate threats to its survival.

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White-naped Swifts on Birda

Sightings
A map showing the sighting location
Profile picture for Diego Guerrero-Lara
Diego Guerrero-Lara
09 Apr 2024 - 5:43pm
Mexico

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