House martingale gathering mud for nest

---

Size: 3300px × 2011px
Photo credit: © GEORGE RESZETER / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: avian, bird, birding, birds, birdwatch, birdwatching, collect, collecting, delichon, europe, gather, gathers, george, hirundine, house, martin, material, mud, nature, nest, nestin, nesting, ornithology, reszeter, rump, swift, urbica, urbicum, white