Barn swallow (Hirundo rustica) nestlings. This is the most widespread species of swallow in the world. Like their name suggests, they build their cup-shaped mud nests almost exclusively on human-made structures. Photographed in Dorset, UK in July.

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Photo credit: © COLIN VARNDELL/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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