Cliff swallow (Petrochildon pronator) watches from its cliff face nest. Nest building may be limited by mud availability.

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Size: 4368px × 2912px
Location: Giant Springs State Park, Great Falls, MT.
Photo credit: © Craig Larcom / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., animalia, aves, bird, builder, cascade, central, chordata, cliff, colony, common, county, eater, gourd, hirundinidae, insect, montana, mud, nest, nester, passeriformes, petrochelidon, pyrrhonota, shaped, social, songbird, swallow, western