tricking her abusive husband. There are at least five species of saw-wing. The black saw-wing has a large number of subspecies and many of these are sometimes...

The mountain saw-wing (Psalidoprocne fuliginosa), also known as the mountain rough-winged swallow or the Cameroon Mountain rough-winged swallow is a species...

saw-wing (Psalidoprocne obscura), also known as the Fanti rough-winged swallow, is a small passerine bird in the swallow family. The Fanti saw-wing has...

The black saw-wing (Psalidoprocne pristoptera), also known as the blue saw-wing or black rough-winged swallow, is a small passerine bird in the swallow...

The swallows, martins, and saw-wings, or Hirundinidae are a family of passerine songbirds found around the world on all continents, including occasionally...

The square-tailed saw-wing (Psalidoprocne nitens), also known as the square-tailed rough-winged swallow is a species of bird in the family Hirundinidae...

The white-headed saw-wing (Psalidoprocne albiceps), also known as the white-headed rough-winged swallow is a species of bird in the family Hirundinidae...

with a speed estimated at 11 m/s (40 km/h), up to 20 m/s (72 km/h) and a wing beat rate of approximately 5, up to 7–9 times each second. The barn swallow...

9-20g. From the Gould collection in Tasmania a “natural size” male had a wing size of 11.1 cm (4.4 in), tail size of 7.4 cm (2.9 in), and a culmen of 0...

means "scraper wing" and the species name, serripennis, is derived from Latin and means "saw feather". In the common name, "rough-winged" refers to the...

the air during flight. The birds are agile hunters and eat a variety of winged insects. Rarely, they will come to the ground to eat insects. They usually...

The western house martin flies with a wing beat averaging 5.3 beats per second, which is faster than the wing beat of 4.4 beats per second for the barn...

The sand martin's twittering song is continuous when the birds are on the wing and becomes a conversational undertone after they have settled in the roost...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

subgenus, Iridoprocne, on the basis of its plumage, along with the white-winged swallow, Chilean swallow, white-rumped swallow, and mangrove swallow. By...

song of the brown-throated martin is continuous when the birds are on the wing, and becomes a conversational undertone after they have settled in the roost...

ranges and wing length. T. t. thalassina has slightly longer wings and has been known to breed as far north as Alaska, while the shorter winged T. t. brachyptera...

flight appears relatively slow for a swallow. Rapid wing beats are interspersed with flat-winged glides, and its long flexible primaries give it the agility...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

The southern rough-winged swallow (Stelgidopteryx ruficollis) is a small swallow. It was first formally described as Hirundo ruficollis by French ornithologist...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

nests tightly together, on top of one another, under bridges or alongside mountain cliffs. Living in large populations, these aerial insectivores use extensive...

and lay 3 to 6 eggs. They normally nest under cliff overhangs in their mountain homes, but will readily adapt to buildings such as mosques and bridges...

The white-winged swallow (Tachycineta albiventer) is a resident breeding swallow in tropical South America from Colombia, Venezuela, Trinidad, and Argentina...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...

slightly at the tips to give narrow racquets 4.9–8.5 cm (1.9–3.3 in) long. The wing length averages 11.5 cm (4.5 in), the tail is 10.7 cm (4.2 in) long, and...

Genus Psalidoprocne (saw-wings) Square-tailed saw-wing Mountain saw-wing White-headed saw-wing Black saw-wing Fanti saw-wing Pseudhirundo Grey-rumped...