American Toad (Anaxyrus americanus)
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. Bufonids are known as 'True Toads,' characterized by the presence of parotoid glands and a lack of teeth in the upper jaw.
Species
American Toad (Anaxyrus americanus)
Family
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. Bufonids are known as 'True Toads,' characterized by the presence of parotoid glands and a lack of teeth in the upper jaw.
Size
Adult SVL ranges from 5 to 10 cm (2 to 4 inches). Females are generally larger than males. Metamorphs are tiny, often less than 1 cm upon leaving the water.
Conservation
IUCN Status: Least Concern. Population is stable across most of its range, though local declines occur due to habit loss, pesticide use, and road mortality.
Description
The quintessential garden visitor, the American Toad is a rugged survivor. In its natural environment, its warty, mottled skin provides perfect camouflage against leaf litter, appearing like a small stone or clump of earth until it hops.
Key Features
Look for a dry, warty skin, kidney-shaped parotoid glands, and specifically 1-2 warts within each dark spot on the back to confirm the species.
Physical Description
A robust, squat amphibian with a short snout and powerful hind limbs. It features large, kidney-shaped parotoid glands behind the eyes and prominent cranial crests on the head. The eyes have horizontal pupils and metallic irises.
Skin Texture & Coloration
The skin is dry and highly tuberculate (warty). Coloration varies from brown, gray, to olive or brick red. There are usually dark spots on the back, and the underside is typically light with dark speckles (mottling) on the chest.
Distinguishing Features
Identified by having only 1 or 2 large warts per dark dorsal spot. The cranial crests behind the eyes are either separate from the parotoid glands or connected only by a short spur, unlike the Southern Toad.
Habitat
Generalist species found in forests, grasslands, suburban backyards, and agricultural fields. It requires semi-permanent shallow water for breeding, such as ponds, ditches, or slow-moving streams.
Geographic Range
Native to North America, spanning from eastern Canada through the eastern and central United States, reaching as far south as Georgia and as far west as the eastern Dakotas.
Behavior
Primarily nocturnal, though often seen during the day in damp weather. It is a terrestrial walker/hopper and a skilled burrower. When threatened, it may inflate its body to appear larger or secrete toxins from its parotoid glands.
Diet & Feeding
An opportunistic carnivore that uses a sit-and-wait strategy. It eats a wide variety of invertebrates, including beetles, slugs, earthworms, spiders, and ants, using a sticky tongue to capture prey.
Reproduction
Breeding occurs in spring (March to June). Males use a long, high-pitched trill to attract females. Eggs are laid in long, gelatinous strings (often thousands per clutch) submerged in shallow water.
Vocalizations
The advertisement call is a musical, high-pitched trill lasting 6 to 30 seconds. It sounds somewhat like a steady whistle and can be heard from long distances during the spring chorus.
Life Cycle
Eggs hatch in 3-12 days into small black tadpoles. Tadpoles aggregate in schools for safety and metamorphose into toadlets in 5-10 weeks. They reach sexual maturity in 2-3 years and can live over 10 years in the wild.
Conservation Status
IUCN Status: Least Concern. Population is stable across most of its range, though local declines occur due to habit loss, pesticide use, and road mortality.
Toxicity & Defense
Possesses parotoid glands that secrete bufotoxins when pressured. These toxins are distasteful and irritating to the mucous membranes of predators like dogs, though usually not lethal to humans.
Ecological Role
Acts as a biological control agent for insect populations. As tadpoles, they graze on algae and detritus, helping to keep water bodies clear.
Similar Species
Fowler's Toad (Anaxyrus fowleri) which has 3 or more warts per spot, and the Southern Toad (Anaxyrus terrestris) which has higher, more prominent cranial crests.
Observation Tips
Listen for their trill on warm, rainy spring nights near shallow water. In gardens, they can be found by looking under porch steps, flower pots, or logs during the day.
Handling & Safety
Safe to touch, but hands should be washed immediately after. Avoid touching eyes or mouth after handling to prevent irritation from skin secretions. Toads should be handled with wet hands to protect their skin.
Seasonal Activity
Active from early spring through late fall. They hibernating/brumate during the winter by burrowing deep into the soil below the frost line.
Cultural Significance
Commonly featured in Western folklore regarding 'warts' (a myth; they do not cause warts in humans). They are often viewed as a symbol of luck in gardens due to their appetite for pests.
Interesting Facts
American Toads can shed their skin every few days as they grow, often eating the old skin to recycle nutrients. They also have an incredible homing instinct and may return to the same breeding pond every year.