American Toad (Anaxyrus americanus)
Order Anura, Family Bufonidae, Genus Anaxyrus. This family consists of 'true toads', characterized by parotoid glands and dry, warty skin.
Species
American Toad (Anaxyrus americanus)
Family
Order Anura, Family Bufonidae, Genus Anaxyrus. This family consists of 'true toads', characterized by parotoid glands and dry, warty skin.
Size
Adult SVL typically ranges from 5 to 10 cm (2 to 4 inches). Females are generally larger than males. Metamorphs are very small, often less than 1 cm.
Conservation
IUCN Status: Least Concern. Populations are generally stable, though like all amphibians, they are vulnerable to habitat fragmentation, pesticides, and the chytrid fungus.
Description
The quintessential garden toad, the American Toad is a rugged survivor. In the wild, its cryptic coloration allows it to vanish against leaf litter, but its charmingly grumpy expression and beautiful spring trill make it a favorite for nature enthusiasts.
Key Features
Large parotoid glands separated from cranial crests; one or two warts inside each dark spot on the back; dry, bumpy skin and a white belly often mottled with black.
Physical Description
A robust, squat amphibian with short limbs and a blunt snout. Features prominent cranial crests and large, kidney-shaped parotoid glands behind the eyes. The pupils are horizontal and the iris is typically gold or copper.
Skin Texture & Coloration
Skin is dry and covered in various-sized warts or tubercles. Coloration varies from brown and gray to olive or brick-red. The back usually features dark spots that contain only one or two large warts each. A light-colored dorsal stripe is often visible.
Distinguishing Features
It is distinguished from the Woodhouse's Toad by having only 1-2 warts per dark dorsal spot and by parotoid glands that either do not touch the cranial crests or are connected by a short spur.
Habitat
Extremely versatile; found in forests, grasslands, gardens, and suburban backyards. Requires semi-permanent or ephemeral water bodies for breeding, such as ponds, ditches, or shallow pools.
Geographic Range
Common throughout eastern North America, from central Canada south to the northern parts of the Gulf States and west to the eastern edge of the Great Plains.
Behavior
Primarily nocturnal, though active during the day in humid or rainy weather. They are terrestrial and move with short hops. When threatened, they inflate their bodies and may secrete toxins or urine.
Diet & Feeding
Generalist carnivore eating a wide variety of invertebrates including beetles, snails, slugs, earthworms, and spiders. They utilize a flicking tongue to catch prey and are excellent at controlling garden pests.
Reproduction
Explosive breeders in spring (March-June). Males congregate at water sources and produce long, high-pitched trills. Eggs are laid in long, gelatinous strings, often numbering in the thousands.
Vocalizations
The advertisement call is a musical, high-pitched trill lasting 6 to 30 seconds. It is often described as one of the most melodic sounds of the spring chorus.
Life Cycle
Eggs hatch in 3-12 days. Tadpoles are small, black, and gregarious, metamorphosing within 5-10 weeks. They can live up to 5-10 years in the wild, and longer in captivity.
Conservation Status
IUCN Status: Least Concern. Populations are generally stable, though like all amphibians, they are vulnerable to habitat fragmentation, pesticides, and the chytrid fungus.
Toxicity & Defense
Produces bufotoxins from parotoid glands which can irritate mucus membranes or be toxic to pets if swallowed. These toxins protect against most predators like mammals and birds.
Ecological Role
Acts as both a significant predator of invertebrates (pest control) and a prey source for specialist predators like Garter Snakes, which have evolved immunity to their toxins.
Similar Species
Fowler's Toad (Anaxyrus fowleri), which has 3 or more warts per spot and parotoid glands that touch the cranial crests.
Observation Tips
Best found on warm, humid nights in the spring near shallow water. Use a flashlight to spot them on garden paths or forest floors after a rain shower.
Handling & Safety
Safe to watch, but wash hands thoroughly after handling due to skin secretions. Do not touch eyes or mouth after touching a toad. Toads are sensitive to chemicals on human skin like lotions.
Seasonal Activity
Active from early spring to late autumn. They hibernate (brumate) during the winter by burrowing deep into the soil below the frost line.
Cultural Significance
Frequently appearing in folklore as 'warts' (falsely) and used as a symbol of garden health. They are often seen as beneficial 'familiars' in historical European folklore.
Interesting Facts
A single female can lay up to 20,000 eggs. They shed their skin every few days and typically eat the shed skin to recycle nutrients.