Sand martin

This species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae, and originally named Hirundo riparia; the description consisted of the simple "H[irundo] cinerea, gula abdomineque albis" ("an ash-grey swallow, with white throat and belly") and the type locality was simply given as "Europa",[3] subsequently refined to refer to Linnaeus's homeland of Sweden.

[7] The banded martin (Neophedina cincta) of sub-Saharan Africa is very similar in plumage pattern, but is markedly larger, nearly double the weight.

Linnaeus already remarked on this species' breeding habits: Habitat in Europae collibus arenosis abruptis, foramine serpentino ("it lives in Europe, in winding holes in sheer sandy hills").

[3][11] In Britain, the sand martin is the first of its family to appear on its breeding grounds, arriving from the middle of March, a week or two in advance of the barn swallow.

Later parties accompany other swallow species, but for a time, varying according to weather, the birds remain at these large waters and do not visit their nesting haunts.

In Canada, it is listed as Threatened under Schedule 1 of the federal Species at Risk Act (SARA) due to the loss of 98% of its Canadian population over the past 40 years.

[15] They are considered threatened in California, where populations exist in the Sacramento Valley[16] and at two coastal sites, Año Nuevo State Park and Fort Funston.

R. r. shelleyi at Abbassia, Egypt