Do any sparrows build mud nests?
Answer Sparrows generally build cup or cavity nests from materials such as grass, twigs, paper, string, dryer lint and their own feathers. Nesting materials vary greatly by species, including everything from spider webs to the bird’s saliva. Mud is used by swallows, swifts, martins, phoebes, kingfishers, magpies, flamingoes, and some other species not found in North America. The only exception would be the House Sparrow, which is known to occassionally re-use mud nests built by other birds.
