Hirundo Pyrrhonota is a scientific name that belongs to a species of bird commonly known as the Cliff Swallow. Synonyms for this species include Petrochelidon pyrrhonota, Hirundo fulva, and Petrochelidon fulva. These synonyms are used interchangeably within the scientific community to refer to the same bird species. The Cliff Swallow is a migratory bird that typically nests on cliffs, bridges, and buildings. It is a small bird with a distinctive steel blue color, a buff-colored rump, and a square tail. Cliff Swallows are social birds that form large nesting colonies, and they are known for their astonishing aerial acrobatics.