Cave Swallow (Petrochelidon fulva) on the nest, Marathon, Brewster County, Texas.

Cave Swallow (Petrochelidon fulva) on the nest, Marathon, Brewster County, Texas.

Cave Swallow (Petrochelidon fulva) on the nest, Marathon, Brewster County, Texas. -- source link


#marathon#trans-pecos#chihuahuan desert
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