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A cliff swallow nest occupied by a house sparrow. The nesting sites can be vulnerable to predation by other cavity-nesting bird species, such as the house sparrow. [4] [5] These birds will search a number of swallow nests for the perfect place to make their own nest, destroying numerous eggs in the process. [4]
Although the Cliff Swallow can nest solitarily, it usually nests in colonies. Colonies tend to be small in the East, but further west they can number up to 3,700 nests in one spot. Within a Cliff Swallow colony some swallows lay eggs in another swallow's nest.
28 lip 2012 · Key identification features include the pale rump and forehead and rusty cheeks. Groups gather mud in their bills along streambanks, lakesides, or puddles to build their nests. Builds mud nests in colonies on cliff ledges or under bridges, eaves, and culverts.
Cliff Swallows build their mud nests on cliff faces and other vertical surfaces in colonies containing hundreds, even thousands of other birds. They also build nests in the eaves of buildings. The pair works together, gathering pellets of wet mud in their beaks and laying them down one by one in ...
These birds like to build large nesting colonies on cliffs, buildings, and under bridges. Learn more on what makes cliff swallows unique.
Cliff Swallows originally were birds of the western mountains, where they still nest underneath horizontal rock ledges on the sides of steep canyons in the foothills and lower elevations of the Sierra Nevada and Rocky and Cascade mountains.
Nest is made of dried mud and shaped like a gourd, with large chamber for nest, narrowing to small entrance on side. Both sexes help build nest; inside of nest sparsely lined with grass and feathers. May repair and reuse old nest, sometimes that of another species.
