cliff swallow n North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls Synonym(s) Hirundo pyrrhonota
News & Articles cliff swallow Judge set to rule on Petaluma highway work blamed for bird deaths Migratory cliff swallows nest on the Petaluma bridge over the Petaluma River Friday. June 29, 2013 - The Petaluma Argus-Courier