American Toad (Anaxyrus americanus)
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. This is a "true toad," characterized by terrestrial habits, lack of teeth, and prominent parotoid glands.
Species
American Toad (Anaxyrus americanus)
Family
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. This is a "true toad," characterized by terrestrial habits, lack of teeth, and prominent parotoid glands.
Size
Adult SVL typically ranges from 5 to 9 cm (2 to 3.5 inches). Females are generally larger than males. Maximum records reach approximately 11 cm. Weight varies significantly based on hydration and egg production.
Conservation
IUCN Status: Least Concern. Population is stable overall, though localized declines occur due to habitat fragmentation, pesticides, and road mortality. It is highly adaptable to human-altered landscapes.
Description
The American Toad is a classic fixture of North American woodlands and gardens. Its warty skin and dry appearance allow it to thrive away from water for extended periods. In the spring, their ethereal, flute-like trills are a hallmark of the season. To see one in a cardboard box, as in this photo, is common when they wander into garages or basements seeking cool, damp shelter.
Key Features
Check for 1-2 warts in each dark spot and cranial crests that do not contact the parotoid glands or do so only via a small spur.
Physical Description
A robust, squat amphibian with a short snout and powerful, thick hind limbs. The head features prominent cranial crests and large, kidney-shaped parotoid glands behind the eyes. It has horizontal pupils and a visible tympanum. Feet are relatively short with minimal webbing, designed for burrowing and walking rather than swimming.
Skin Texture & Coloration
Skin is highly granular and "warty," with individual warts of varying sizes. Coloration typically consists of shades of brown, tan, olive, or brick red. Large dark blotches are present on the back, usually containing only one or two large warts. Ventral side is light-colored and often mottled with dark spots.
Distinguishing Features
The primary diagnostic marker is the presence of 1-2 warts within each large dark dorsal spot. Additionally, the cranial crests on the head are either completely separated from the parotoid glands or connected to them only by a short spur.
Habitat
Found in a vast array of habitats including temperate forests, grasslands, suburban gardens, and agricultural fields. Requires semi-permanent or ephemeral water bodies (ponds, ditches, or shallow pools) for breeding.
Geographic Range
Common throughout eastern North America, from eastern Canada south to the northern parts of Georgia and west to the eastern edges of the Great Plains.
Behavior
Primarily nocturnal, though often active during the day in damp weather. It is a terrestrial hop-walker. When threatened, it inflates its body with air to appear larger and may exude toxins from its parotoid glands.
Diet & Feeding
An opportunistic carnivore that uses a sit-and-wait or slow-stalking strategy. It consumes large quantities of insects, spiders, slugs, and earthworms. Prey is captured using a sticky, flip-out tongue.
Reproduction
Breeds in the spring (March to June). Males congregate in shallow water and produce a long, high-pitched musical trill. Amplexus is axillary. Females lay eggs in two long, gelatinous strings that can contain up to 15,000 eggs.
Vocalizations
A very long, high-pitched musical trill that can last 6 to 30 seconds. The pitch is constant but has a melodious quality. In a chorus, multiple males create a continuous wall of sound.
Life Cycle
Eggs hatch in 3-12 days depending on temperature. The tadpoles are small, black, and often swim in dense schools. Metamorphosis occurs in 40-70 days. Juveniles (toadlets) emerge onto land and reach sexual maturity in 2-3 years.
Conservation Status
IUCN Status: Least Concern. Population is stable overall, though localized declines occur due to habitat fragmentation, pesticides, and road mortality. It is highly adaptable to human-altered landscapes.
Toxicity & Defense
Produces bufotoxins and bufotenins from the parotoid glands and skin warts. These chemicals are irritating to mucous membranes and can be dangerous if ingested by small pets, but are generally harmless to humans unless eyes or mouth are rubbed.
Ecological Role
Acts as a vital biological control agent for pest insects and slugs. They serve as a food source for specialized predators like the Hognose Snake, which is immune to their toxins.
Similar Species
Fowler's Toad (Anaxyrus fowleri) has 3 or more warts per dark spot and cranial crests that touch the parotoid glands. Southern Toad (Anaxyrus terrestris) has high, prominent cranial knobs.
Observation Tips
Look for them on paved paths or in gardens on humid nights using a flashlight. Listening for their long trills near shallow water in early spring is the easiest way to locate breeding populations.
Handling & Safety
Safe for humans to touch, but wash hands thoroughly afterward to avoid irritation from skin secretions. Always wet your hands before touching any amphibian to protect their sensitive skin from oils and salts.
Seasonal Activity
Active from early spring through late autumn. They hibernate (brumate) underground, burrowing below the frost line using their hind legs.
Cultural Significance
A symbol of garden health and a frequent character in children's literature (e.g., 'Frog and Toad'). Historically associated with folklore involving 'wart-giving' (a myth) or as familiars/ingredients in alchemy and traditional remedies.
Interesting Facts
American Toads can live up to 30 years in captivity, though 5-10 years is more common in the wild. They shed their skin every few days and typically eat the old skin after it is pulled off.