American Toad (Anaxyrus americanus)
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. This family is characterized by dry, warty skin and prominent parotoid glands behind the eyes.
Species
American Toad (Anaxyrus americanus)
Family
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. This family is characterized by dry, warty skin and prominent parotoid glands behind the eyes.
Size
Adult SVL typically ranges from 5 to 9 cm (2 to 3.5 inches). Females are generally larger than males. Metamorphs are tiny, often the size of a fingernail (under 1 cm).
Conservation
IUCN Status: Least Concern. Populations are generally stable, though locally threatened by habitat fragmentation, road mortality, and pesticide runoff.
Description
The quintessential 'garden toad,' this species is a charming and familiar sight in North American landscapes. With its golden-flecked eyes and textured skin, it is a master of camouflage within leaf litter, emerging on rainy nights to patrol for garden pests.
Key Features
Look for 1-2 warts per dark spot, prominent parotoid glands, a musical long trill call, and cranial crests that are usually not in direct contact with the parotoid glands.
Physical Description
A robust, squat-bodied amphibian with a short snout. It features large, kidney-shaped parotoid glands behind the eyes, cranial crests on the head, and relatively short muscular hind limbs adapted for hopping rather than leaping. The eyes are prominent with horizontal pupils.
Skin Texture & Coloration
The skin is dry and highly granular (warty). Coloration varies from brown, gray, to olive or reddish-brown with darker spots. A light mid-dorsal stripe is often present. The venter is usually light-colored with dark speckling.
Distinguishing Features
It can be identified by and distinguished from Fowler's Toad by having only 1 or 2 large warts per dark dorsal spot. Additionally, the parotoid glands are either separated from the cranial crests or connected to them by a short spur.
Habitat
Found in various terrestrial habitats including forests, meadows, gardens, and backyards. Requires semi-permanent or ephemeral water bodies (ponds, ditches, shallow pools) for breeding.
Geographic Range
Native to North America, ranging across eastern Canada and the eastern half of the United States, from the Atlantic coast west to the eastern Great Plains.
Behavior
Primarily nocturnal, though active on cloudy/rainy days. Locomotion is a series of short hops. Defensive behaviors include inflating the body to appear larger and secreting bufotoxins from parotoid glands.
Diet & Feeding
Generalist carnivore eating large quantities of insects, spiders, slugs, and earthworms. They use a 'sit-and-wait' strategy, flicking out a sticky tongue to grab prey.
Reproduction
Breeds in spring (March–May) triggered by rain and warm nights. Males congregate in shallow water to call. Amplexus is axillary. Females lay up to 20,000 eggs in long, gelatinous strings.
Vocalizations
The advertisement call is a long, high-pitched musical trill lasting 6 to 30 seconds. In a chorus, it sounds like a pleasant, continuous high-pitched hum.
Life Cycle
Eggs hatch in 3–12 days. Tadpole stage lasts 5–10 weeks depending on water temperature. Metamorphosis occurs in early summer. Sexual maturity is reached in 2–3 years; they can live up to 10 years in the wild.
Conservation Status
IUCN Status: Least Concern. Populations are generally stable, though locally threatened by habitat fragmentation, road mortality, and pesticide runoff.
Toxicity & Defense
Parotoid glands secrete bufotoxins which can irritate mucous membranes and are toxic to small mammals or pets if ingested. The alkaloids cause a bitter taste and can induce vomiting in predators.
Ecological Role
High-level invertebrate predator that controls insect populations. They serve as a vital food source for hognose snakes, garter snakes, and various birds of prey.
Similar Species
Fowler's Toad (Anaxyrus fowleri) which has 3+ warts per spot; Southern Toad (Anaxyrus terrestris) which has higher, more prominent cranial knobs.
Observation Tips
Listen for their high-pitched trills near shallow ponds on warm spring nights. During the day, look under logs, flower pots, or leaf litter in moist, shaded areas.
Handling & Safety
Safe to touch but wash hands afterward to avoid eye irritation from skin secretions. Do not handle after applying hand sanitizer or lotion, as amphibians absorb chemicals through their skin.
Seasonal Activity
Active from early spring through autumn. They hibernate (brumate) during winter by burrowing deep into the soil below the frost line.
Cultural Significance
Commonly depicted in folklore as a companion to garden spirits. They are well-regarded by gardeners as natural forms of pest control for crops and flowers.
Interesting Facts
The American Toad can eat up to 1,000 insects in a single night. They also shed their skin every few days and typically eat the shed skin to recycle nutrients.