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Version 1.0

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Biscutate Swift Streptoprocne biscutata

Audrey Bowe
Version: 1.0 — Published September 19, 2014


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Geographic Variation

Two subspecies currently recognized:

seridoensis, described as Streptoprocne biscutata seridoensis Sick 1991; type locality Serra do Bico da Arara, Seridó region, Rio Grande do Norte, Brazil

Breeding range unknown. Occurs in northeastern Brazil, in Piauí and Rio Grande do Norte, as a nonbreeding visitor, where it arrives in February and remains until October (Sick 1991).

Apparently identical in plumage to nominate biscutata, but differs in its smaller size, with no overlap in wing length (Sick 1991). Sick's sample size was small, however, and perhaps the validity of this subspecies should be reexamined in light of the seasonal variations in wing length reported by Pichorim (2010).

biscutata, described as Chaetura biscutata Sclater 1865; type locality Rio de Janeiro and Ypanema, São Paulo, Brazil

Occurs in southeastern Brazil from Minas Gerais south to Rio Grande do Sul (Sick 1997) and northeastern Argentina (Pearman et al. 2010).

Related Species

Streptoprocne biscutata presumably is closely related to Streptoprocne zonaris (White-collared Swift), but the phylogenetic relationships within Streptoprocne have not been resolved.

Recommended Citation

Bowe, A. (2014). Biscutate Swift (Streptoprocne biscutata), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.bisswi1.01