Petrochelidon is a genus of birds known as cliff-nesting swallows. The genus includes all of the five species of birds commonly called Cliff Swallow, and contains the following species:
Read more about Petrochelidon: Species in Taxonomic Order
Petrochelidon is a genus of birds known as cliff-nesting swallows. The genus includes all of the five species of birds commonly called Cliff Swallow, and contains the following species:
Read more about Petrochelidon: Species in Taxonomic Order