Purple Martin Flying In The Sky Stock Image

Purple martin flying in the sky, it is a large, dark swallow. Distinctive north of Mexico, where it is the largest swallow. Adult males are dark overall with a purplish-blue iridescence visible at close range. Females are grayer with iridescence on the crown and back, and variable splotchy patterning on the underparts. Immatures lack any purplish color and have a whiter belly. Gives a distinctive liquid gurgling call.