Incilius alvarius

The Colorado River toad, also known as the Sonoran Desert toad, is a large amphibian native to the southwestern United States and northern Mexico, including the Sonoran Desert. Recognizable by its warty, olive-green skin and robust body, this nocturnal toad spends much of its time burrowed underground to avoid the desert heat, emerging at night to hunt insects, small mammals, and other invertebrates.

According to the International Union for Conservation of Nature (IUCN), the Colorado River toad is listed as Least Concern. While populations remain stable, they are vulnerable to habitat loss from urban development, pollution, and water diversion. Additionally, because they rely on seasonal rains to breed, changes in precipitation patterns due to climate change could affect reproduction. Conservation efforts focus on protecting desert wetlands and educating the public about safe coexistence.

As insect and small animal predators, Colorado River toads help control pest populations in desert ecosystems. They also serve as prey for snakes, birds, and mammals, making them an important link in the food web.

Did you know?

They spend much of the year underground, emerging after rains to feed and breed.

They secrete toxins from glands behind their eyes as a defense against predators.

Breeding occurs in temporary desert pools created by seasonal rains.

They hunt primarily at night, feeding on insects, spiders, and small vertebrates.

Burrowing helps them avoid extreme daytime temperatures.