Links and literature

ARKive [GES/birds/Hirundo_atrocaerulea]
ARKive [http://www.arkive.org]

Bird Life [7127] [as Hirundo atrocaerulea Sundevall, 1850]
Bird Life [http://www.birdlife.org]
Data retrieved on: 2008/09/07

Clements, J. F. (2009): Clements Checklist of Birds of the World v6.4 [http://www.birds.cornell.edu/clementsche...], Cornell Lab of Ornithology [as Hirundo atrocaerulea]
Data retrieved on: 2009/12/30

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