Red-rumped Swallow ( Hirundo daurica) gathering mud for nest building, Bulgaria

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Size: 5200px × 3454px
Photo credit: © Malcolm Schuyl / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: beak, behaviour, behavoiur, bird, breeding, building, collecting, europe, hirundinidae, hirundo, material, mud, nest, red-rumped, swallow