The male's voice is a chuckling quack. A chorus sounds like a flock of ducks. Males vocalize while floating or resting on submerged vegetation. The vocal sacs are located on the sides of the body. The breeding season lasts two weeks at the longest.
Males call night and day.
Males attempt amplexus with anything they get a hold of. Amplexed males give a release call and struggle to let the aggressor know he has grabbed another male. Such struggling can cause quite a commotion and I see and hear several such encounters during a single breeding season. Females lay a floating cluster of nearly 1,000 eggs. Often, most or all of the females will lay their eggs on one end of the pond creating a huge mat of eggs.