American Toad (Anaxyrus americanus)
Order Anura, Family Bufonidae, Genus Anaxyrus. This family, the 'true toads,' is characterized by dry, warty skin, parotoid glands behind the eyes, and a lack of teeth.
Species
American Toad (Anaxyrus americanus)
Family
Order Anura, Family Bufonidae, Genus Anaxyrus. This family, the 'true toads,' is characterized by dry, warty skin, parotoid glands behind the eyes, and a lack of teeth.
Size
Adult SVL typically ranges from 5 to 11 cm (2-4.25 inches). Females are generally larger than males. Weight varies widely based on hydration and egg production, typically 20-50 grams.
Conservation
IUCN Status: Least Concern. Population is stable, though they are susceptible to habitat fragmentation, pesticides, and the Chytrid fungus (Bd).
Description
A classic backyard visitor, the American Toad is a master of camouflage. With its earthy tones and textured skin, it blends perfectly into leaf litter. It is a resilient species that has adapted well to human-modified landscapes, often seen hunting near porch lights at night.
Key Features
The presence of only 1 or 2 warts per dark spot and the parotoid glands being separate from (or only loosely connected to) the cranial crests.
Physical Description
A robust, stout-bodied amphibian with a rounded snout. It features prominent kidney-shaped parotoid glands and cranial crests (bony ridges) on the head. The limbs are short and adapted for hopping or walking rather than swimming.
Skin Texture & Coloration
The skin is dry and highly granular (warty). Coloration varies from brown and gray to olive or brick red. There are often darker spots on the back, each containing only one or two large warts. The underside is typically light with dark speckling or mottling.
Distinguishing Features
The most diagnostic feature is that the parotoid gland is either separated from the cranial crest or connected to it by a short spur. Additionally, each dark dorsal spot usually contains only 1 to 2 warts, distinguishing it from the Fowler's Toad.
Habitat
Extremely versatile, found in forests, grasslands, suburban gardens, and agricultural fields. They require semi-permanent ponds or shallow water for breeding but are primarily terrestrial as adults.
Geographic Range
Native to North America, spanning from eastern Canada southward to the Gulf Coast and westward to the eastern edge of the Great Plains.
Behavior
Primarily nocturnal, though active during the day in humid weather. They are terrestrial and move with short hops. When threatened, they often inflate their bodies to appear larger or secrete toxins from their parotoid glands.
Diet & Feeding
An opportunistic carnivore eating insects, spiders, slugs, and earthworms. They use a 'sit-and-wait' strategy, flicking out a sticky tongue to capture prey.
Reproduction
Breeding occurs from March to July, triggered by spring rains. Males gather in shallow water and produce a long, high-pitched trill. Eggs are laid in two long, gelatinous strings, often numbering in the thousands.
Vocalizations
The advertisement call is a pleasant, musical trill lasting 6 to 30 seconds. It is consistent in pitch and can be heard from a significant distance during the peak of the breeding season.
Life Cycle
Eggs hatch in 3-12 days into small black tadpoles. Metamorphosis into toadlets occurs in 1-2 months. Sexual maturity is reached in 2-3 years, with a potential lifespan of up to 10 years in the wild (longer in captivity).
Conservation Status
IUCN Status: Least Concern. Population is stable, though they are susceptible to habitat fragmentation, pesticides, and the Chytrid fungus (Bd).
Toxicity & Defense
Produces bufotoxins from parotoid glands and skin. These chemicals can irritate mucous membranes and are toxic if ingested by pets, causing drooling, vomiting, or cardiac distress.
Ecological Role
They act as a significant controller of invertebrate populations. As tadpoles, they graze on algae, and as adults, they serve as a food source for hognose snakes and raccoons.
Similar Species
Fowler's Toad (Anaxyrus fowleri) has 3 or more warts per spot and parotoid glands that touch the cranial crest. Southern Toad (Anaxyrus terrestris) has much higher cranial crests with knobs.
Observation Tips
Look for them on warm, rainy nights on roads or in gardens. During the breeding season, follow the sound of their melodic trilling to shallow ponds or flooded ditches.
Handling & Safety
Handling with bare hands is generally safe but can irritate the skin if the toad is stressed and secretes toxins. Always wash hands afterward; NEVER touch your eyes or mouth after handling.
Seasonal Activity
Active from early spring until the first hard frost. During winter, they burrow deep into the soil below the frost line to brumate (hibernate).
Cultural Significance
Often featured in folklore as a companion to witches or a symbol of transformation. In modern times, they are celebrated in gardens as natural pest controllers.
Interesting Facts
The toad sheds its skin every few days as it grows and typically eats the shed skin to recycle nutrients. Their skin can change color slightly based on temperature and moisture levels.