Fry, C. H.; Smith, D. A. 1985. A new swallow from the Red Sea. Ibis 127: 1-6.
Madge, S. C.; Redman, N. J. 1989. The existence of a form of cliff swallow Hirundo sp. in Ethiopia. Scopus 13: 126-129.
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Recommended citation
BirdLife International (2023) Species factsheet: Petrochelidon perdita. Downloaded from
http://www.birdlife.org on 22/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 22/03/2023.