American toad

American toad is the most common toad in Minnesota. It can be 2″ to 4″, averaging 3″, at maturity.

The background color is usually brown, rarely greenish, red, or gray. There are 3 or 4 pairs of brown to black spots, sometimes bordered in white, on the back. There is often a pale line down the center of the back. Each spot contains 1 or 2 large warts. There are 2 cranial ridges between the eyes. These ridges do not join at the front or back. There are 2 large swellings behind the eyes. These are the paratoid glands, which secrete a toxin to discourage predators. The belly is pale with dark spots. The throat of the male is dark.

2″ to 4″

The call of the male is a high-pitched trill lasting 10 to 30 seconds. The pitch remains constant throughout the call, it does not rise. Other toads may answer with an overlapping call in a the same or a different pitch.

Canadian toad (Anaxyrus hemiophrys) background color is lighter, white or light brown. The warts on the back may be black, brown, or reddish. The 2 cranial ridges join at the rear to form a prominent bump (boss). In Minnesota it is found only in the west-central and northwest regions.

A wide variety of habitats, from forests to prairies, with semi-permanent water adjacent to dense vegetation.

5 to 8 years

Eggs are laid in the early May. Larvae hatch in 3 to 12 days. The tadpole stage lasts 40 to 70 days. Toadlets emerge in late June or early July.

Sexual maturity is reached in 2 or 3 years. Most individuals do not survive the tadpole stage. Those that do may reach 10 years of age, but most reach only 5 to 8 years of age in the wild.

Adults hibernate in the coldest winter months and may aestivate during the hot, dry months of summer.

Algae, plant tissue, organic debris

Small terrestrial insects and other invertebrates

Sources

4, 7, 14, 24, 29, 30, 73, 76, 78.

Common and abundant

This species was formerly classified Bufo americanus. In 2006 all North American true toads (family Bufonidae) were transferred out of the genus Bufo by Frost et al., and several new genera were created.

the size of a quarter They were sunbathing on leaves.

Frog expert?
I'm messaging because I've gotten myself into a pickle.

I made a frog pond in the spring, however there are still many tadpoles (and snails) in the water.

I am now aware some overwinter as tadpoles, but the pond is no deeper than 2'.

I do have a sheet liner in the pond, for what that's worth.

I don't want to kill any of the life in the pond, so I'm very open to suggestions!

Thank you very much in advance!

American toad found in Nerstrand Big Woods SP a few years ago. Hiking here will usually provide wildlife of some kind or flowers in the spring.

This is one of Minnesota's best known herp species. Adults are 2 to 3 1/2 inches snout to vent. The ground color is highly variable, but it is usually a shade of brown. Rarely it is gray, red, or greenish. There are black spots on the back. These spots contain one or two warts. These black spots often have a white border. They have an oval partoid gland behind each eye. The belly is white or yellowish and is heavily mottled with black. There is usually a light mid dorsal stripe down the back.

720p "Color Variations in the American Toad" filmed by Dan W. Andree 2015
Published on Nov 11, 2015

Eastern American Toad (Anaxyrus americanus)
WisCBMnetwork

Eastern American Toad Tadpole Die Off
Scott Tucker

American toad calling
HerpNet

American toads calling 2
HerpNet

Location: Albany, NY

Location: Albany, NY

Location: Albany, NY

Location: Woodbury, MN

Location: Woodbury, MN

Location: Slinger, Wisconsin

Location: Woodbury, Minnesota

the size of a quarter They were sunbathing on leaves.

Location: Pennington Co MN

Location: Crow Wing County, Deerwood

Location: Nerstrand Big Woods State Park

American toad found in Nerstrand Big Woods SP a few years ago. Hiking here will usually provide wildlife of some kind or flowers in the spring.

Location: Nerstrand Big Woods State Park

This is one of Minnesota's best known herp species. Adults are 2 to 3 1/2 inches snout to vent. The ground color is highly variable, but it is usually a shade of brown. Rarely it is gray, red, or greenish. There are black spots on the back. These spots contain one or two warts. These black spots often have a white border. They have an oval partoid gland behind each eye. The belly is white or yellowish and is heavily mottled with black. There is usually a light mid dorsal stripe down the back.