alligators generally mature at a length of . the mating season is in late spring. in april and may, alligators form so-called "bellowing choruses". large groups of animals bellow together for a few minutes a few times a day, usually one to three hours after sunrise. the bellows of male american alligators are accompanied by powerful blasts of infrasound. another form of male display is a loud head-slap. in 2010, on spring nights alligators were found to gather in large numbers for group courtship, the so-called "alligator dances".