![](http://www.alamy.com/thumbs/6/E52133CC-C34D-4BF3-81D5-6F907212C46D/BR5REP.jpg)
Red-rumped Swallow (Hirundo daurica) with beak full of mud for nest building, Bulgaria
Size: 5200px × 3454px
Photo credit: © Malcolm Schuyl / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: beak, behaviour, bird, breeding, building, collecting, europe, hirundinidae, hirundo, mud, nest, red, red-rumped, rumped, swallow