purple martins are fairly noisy, chirping and making sounds that have been described as chortles, rattles, and croaks. the various calls are said to be "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.