Fowler's toad reproduces in warmer seasons of the year, especially in May and June. It breeds in open, shallow waters such as
ponds,
lakeshores, and
marshes. The male produces a call which attracts not only females, but also other males. The calling male may attempt to mate with one of the other males, which will then produce a chirping "release call", informing him of his mistake. It has been found that male Fowler's toads mating calls are affected by the body size and temperature of the caller. Females are often able to discriminate between variations in these calls and select the largest available males. Males are able to alter their calls to make them seem more attractive to females through thermoregulation. When a male finds a female, the pair will initiate
amplexus and up to 7,000 to 10,000 eggs are fertilized. They hatch in 2 to 7 days. Based on observations, Fowler's toads breed repeatedly through the spring. As many as 10 different age classes, separated by several days, have been observed over the course of a breeding season in one small pond. A new tadpole may reach sexual maturity in one season, but the process may take up to three years. Fowler's toad regularly hybridizes with two of its close relatives: the
American toad and the
Woodhouse's toad. The Woodhouse's toad subspecies
Anaxyrus woodhousii velatus, or the East Texas toad, is possibly a hybrid of the Woodhouse's toad and the Fowler's toad. ==Behavior==