Purple martins are quite vocal. They are known to chirp, chortle, rattle, and croak. Their various calls are described as "throaty and rich" and can be rendered as tchew-wew, pew pew, choo, cher, zweet and zwrack. The males have a gurgling and guttural courtship song, a dawn song, and even a subsong used at the end of the breeding season. Tapes of purple martin song are sold to attract martins to newly established birdhouses. The purple martin (Progne subis), from the Passeriformes order, is the