noun
Asian house martin
A small migratory bird of the swallow family, nesting on cliffs and buildings in East Asia.
イワツバメは春になると日本に渡ってくる。
Asian house martins migrate to Japan in spring.
ツバメ is the common barn swallow, while イワツバメ is a specific species that often nests on cliffs and buildings.
Compound of 岩 (iwa, 'rock') + ツバメ (tsubame, 'swallow'), referring to its cliff-nesting habit.