American Toad (Anaxyrus americanus)
Order: Anura; Family: Bufonidae (True Toads); Genus: Anaxyrus; Species: A. americanus. Bufonids are characterized by the absence of teeth, the presence of parotoid glands, and typically dry, warty skin.
Species
American Toad (Anaxyrus americanus)
Family
Order: Anura; Family: Bufonidae (True Toads); Genus: Anaxyrus; Species: A. americanus. Bufonids are characterized by the absence of teeth, the presence of parotoid glands, and typically dry, warty skin.
Size
Adult SVL ranges from 5 to 11 cm (2 to 4.5 inches). Females are generally larger than males. Weight varies by season and health but typically ranges between 20 and 50 grams.
Conservation
IUCN Status: Least Concern. Population: Stable. While common, they are still threatened by habitat fragmentation, pollutants (like lawn chemicals), and the chytrid fungus.
Description
The American Toad is a quintessential backyard inhabitant. With its stout, earthen-colored body and thoughtful-looking eyes, it is a master of camouflage. In a garden or forest floor, it sits like a textured stone until an insect wanders too close. It is a gardener's friend, consuming vast numbers of pests each night.
Key Features
Cranial crests separate from parotoid glands or joined by a short spur; 1 to 2 warts per dark dorsal spot; spotted ventral surface.
Physical Description
A robust, squat amphibian with a short snout and large parotoid glands behind the eyes. The limbs are relatively short, adapted for walking or short hops rather than long leaps. The eyes are prominent with horizontal pupils and a gold-flecked iris. The tympanum is visible but smaller than the eye.
Skin Texture & Coloration
The skin is dry and highly glandular (warty). Coloration varies from tan, brown, or olive to reddish-brown, often with dark spots on the back. These spots typically contain only 1 to 2 warts. The belly is usually white or cream-colored, often with dark mottling (especially on the chest). The parotoid glands are prominent and often distinct in color from the surrounding skin.
Distinguishing Features
High cranial crests that are either not connected to the parotoid glands or are connected by a short spur. Specifically, American Toads have dark dorsal spots containing 1 or 2 large warts; this distinguishes them from Fowler's Toads which have 3 or more warts per spot. The underside is often spotted.
Habitat
Extremely versatile; found in forests, grasslands, suburban gardens, and agricultural fields. They require 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 Gulf Coast of the United States, extending west to the eastern edges of the Great Plains.
Behavior
Primarily nocturnal, though often seen during the day in moist or overcast weather. They are terrestrial and move via short hops. When threatened, they inflate their bodies to appear larger or secrete toxins from parotoid glands.
Diet & Feeding
Generalist carnivores; they eat a wide variety of invertebrates including beetles, snails, slugs, earthworms, and spiders. They hunt using a sit-and-wait strategy, flicking out a sticky tongue to capture prey.
Reproduction
Breeding occurs from late March to early June, triggered by warm spring rains. Males gather at breeding pools and emit a long, high-pitched musical trill. Amplexus is axillary. Eggs are laid in long, distinctive double strings of jelly.
Vocalizations
The advertisement call is a long, melodic, high-pitched trill lasting 6 to 30 seconds. It is one of the most musical calls of all North American amphibians.
Life Cycle
Eggs hatch in 3 to 12 days. Tadpoles are small, dark, and often form dense schools. Metamorphosis occurs in 5 to 10 weeks. Toadlets are tiny when they emerge. Sexual maturity is reached in 2 to 3 years. Lifespan in the wild is often 1 to 5 years, but can exceed 10 years in captivity.
Conservation Status
IUCN Status: Least Concern. Population: Stable. While common, they are still threatened by habitat fragmentation, pollutants (like lawn chemicals), and the chytrid fungus.
Toxicity & Defense
Parotoid glands secrete bufotoxins when the toad is stressed or bitten. These toxins are mildly irritating to human skin but can be dangerous or even lethal to small pets (dogs/cats) if the toad is mouthed or swallowed.
Ecological Role
Important mid-level predator of invertebrates and a food source for hognose snakes, hawks, and raccoons. Tadpoles help control algae levels in breeding ponds.
Similar Species
Fowler's Toad (Anaxyrus fowleri) has 3+ warts per spot and cranial crests that touch the parotoid glands. Woodhouse's Toad (Anaxyrus woodhousii) has a prominent white dorsal stripe and different crest anatomy.
Observation Tips
On warm, rainy spring nights, listen for their long trill near shallow water. In summer, look under porch lights at night where they congregate to eat insects attracted to the light.
Handling & Safety
Generally safe to pick up, but wash hands immediately after. Do not touch your eyes or mouth after handling due to skin toxins. Handling can stress the toad; if you must move one, use wet hands to protect their sensitive skin.
Seasonal Activity
Active from spring through autumn. They hibernate (brumate) during winter by digging below the frost line in loose soil.
Cultural Significance
Commonly featured in children's literature (e.g., 'Frog and Toad'). In folklore, they were once falsely blamed for causing warts in humans. Today, they are symbols of environmental health in suburban settings.
Interesting Facts
The American Toad can skin-breathe and absorb water through a 'pelvic patch' on its belly. Its call is considered a classic sound of spring in the eastern US.