![](http://www.alamy.com/thumbs/6/8BCE0564-52A7-490F-9436-E5AFC97C5971/BR5REH.jpg)
Red-rumped Swallow ( Hirundo daurica) gathering mud for nest building, Bulgaria
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