Arizona Toad

(Anaxyrus microscaphus)

Arizona Toad
Arizona Toad. Photo by Kerry Matz Flickr (CC BY-NC-SA 2.0)

IUCN Conservation Status: Least concern (LC)

Last updated: April 30th, 2004

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Common name(s): Arizona Toad
Binomial name: Anaxyrus microscaphus
Location(s): The United States
Size: 2 to 3-inches

Taxonomy

Kingdom:

Animalia (Animal)

Phylum:

Chordata (Chordates)

Class:

Amphibia (Amphibian)

Order:

Anura (Frogs & Toads)

Family:

Bufonidae (True toad)

Genus:

Anaxyrus

More About the Arizona Toad

The Arizona Toad might not be the flashiest amphibian out there, but it has its own quiet charm. Native to the southwestern U.S., this toad is known for its soft trilling call and desert-savvy lifestyle. It’s especially interesting because it often hybridizes with other toads in its range, making it a bit of a mystery even to scientists.

Size & Physical Appearance

Adult Arizona Toads typically measure between 2 and 3.5 inches in length. They’re fairly short and squat, with warty skin and a muted color palette that helps them blend into dry, rocky environments. You’ll usually see shades of gray, brown, or tan, sometimes with pale spots or blotches on their back.

They have a pale belly, and most individuals have a distinct pale line that runs along the spine (though it’s not always obvious). Unlike some other toads, their cranial crests (bony ridges on top of the head) are either absent or very weak, which helps with ID. Males tend to be smaller and may develop darker throats during breeding season.

Habitat and Range

Arizona Toads are found mostly in the southwestern United States, especially in central and northern Arizona, as well as parts of southwestern Utah and the western edges of New Mexico and Nevada. Their habitat spans a surprising range — from desert canyons and pine forests to riparian areas along streams, rivers, and springs.

They usually live at elevations between 2,000 and 7,000 feet, depending on the region. They prefer slow-moving or still water, especially during the breeding season, but can be seen far from water at other times of year.

Diet

Arizona Toads, like most toads, are opportunistic feeders. That means they’ll eat just about any small creature they can catch. Their diet includes:

  • Ants
  • Termites
  • Beetles
  • Spiders
  • Small grasshoppers and caterpillars

They rely heavily on camouflage to ambush prey rather than chase it, so you might never notice one until it hops away.

Lifespan

In the wild, Arizona Toads can live up to around 5 to 8 years, though many live shorter lives due to predators and environmental factors. In captivity, with proper care, individuals may live longer, but this species is not commonly kept as a pet.

Identification Tips

This toad can be tough to distinguish from other species, especially the Woodhouse’s Toad (Anaxyrus woodhousii), which often overlaps in range and even hybridizes with the Arizona Toad.

Here are some key features to look for:

  • No prominent cranial crests: Arizona Toads lack the strong head ridges seen in Woodhouse’s Toads.
  • Parotoid glands: These are oval and separated from the eye, not touching it.
  • Smaller size and subtle coloring: Arizona Toads are typically smaller with less dramatic blotching than Woodhouse’s Toads.

Their call is also a clue: it’s a short, soft trill, unlike the louder, longer call of other regional toads.

Fun Fact

While most amphibians tend to avoid mixing species, Arizona Toads are frequent hybridizers. In areas where their range overlaps with other toads, especially Woodhouse’s Toads, they often interbreed. This tendency has made them particularly interesting to scientists studying evolution, genetics, and species boundaries.

And here’s a bonus fun bit — during dry seasons, Arizona Toads can go into a state of dormancy underground, called estivation, until the rains return.

In Summary

If you’re exploring creeks or desert canyons in the Southwest and spot a small, quiet toad with earthy tones and a mellow vibe, there’s a good chance you’ve found the Arizona Toad. It might not be loud or flashy, but it’s full of surprises — from its hybrid love life to its desert survival skills — and it’s a valuable part of the amphibian community in the region.

Keep an ear out during spring nights after the rain. That soft trill you hear may just be an Arizona Toad beginning its search for a mate.