American Toad (Anaxyrus americanus)
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. This family is characterized by dry, warty skin, relatively short legs, and prominent parotoid glands behind the eyes that secrete toxins.
Species
American Toad (Anaxyrus americanus)
Family
Order Anura, Family Bufonidae, Genus Anaxyrus, Species A. americanus. This family is characterized by dry, warty skin, relatively short legs, and prominent parotoid glands behind the eyes that secrete toxins.
Size
Adults typically range from 50 to 90 mm (2-3.5 inches) in snout-to-vent length (SVL). Females are generally significantly larger and more robust than males. Largest specimens can reach up to 110 mm.
Conservation
IUCN Status: Least Concern. Populations are generally stable and and widespread, though they are susceptible to habitat fragmentation and local pesticide runoff.
Description
The American Toad is a classic gardener's friend, often seen at dusk hopping through flower beds in search of pests. With its chunky, gold-flecked body and expressive eyes, it is a staple of North American backyard wildlife. Its presence is usually announced by its beautiful, long trill on warm spring nights.
Key Features
Look for the large parotoid glands behind the eyes and the cranial ridges. Count the warts in the dark dorsal spots; if most spots have only 1 or 2 warts, it is an American Toad.
Physical Description
A very robust, squat body with a rounded snout. The limbs are short and muscular designed for hopping and burrowing. The eyes are moderately large with horizontal pupils and a gold/copper iris. The tympanum (eardrum) is visible but smaller than the eye.
Skin Texture & Coloration
The skin is dry and highly granular (warty). Coloration varies from yellowish-tan to brown or olive-green. Large, dark spots on the back typically contain only one or two large warts. A light-colored dorsal stripe is often visible running down the center of the back.
Distinguishing Features
The most diagnostic feature is that the parotoid gland is either separated from the cranial ridge behind the eye or connected to it by a short spur. Additionally, dark spots on the back usually contain only 1-2 warts, distinguishing it from the Fowler's Toad.
Habitat
Highly adaptable, found in forests, grasslands, gardens, and agricultural fields. They require semi-permanent shallow ponds or pools for breeding but are otherwise terrestrial and can be found far from water.
Geographic Range
Native to North America, spanning from eastern Canada down through the eastern and central United States, excluding the southernmost coastal plains.
Behavior
Primarily nocturnal and crepuscular, though they can be active during the day in moist conditions. They are solitary and spend much of the day burrowed in soil or hidden under leaf litter. When threatened, they inflate their bodies to appear larger.
Diet & Feeding
Generalist carnivores that consume a wide variety of invertebrates including beetles, ants, spiders, earthworms, and slugs. They use a 'sit-and-wait' strategy, flicking out a sticky tongue to capture prey.
Reproduction
Breeding occurs in spring (March-May) triggered by warm rains. Males congregate in shallow water and produce a long, high-pitched trill. Eggs are laid in long, gelatinous double-strings tangled in aquatic vegetation.
Vocalizations
The advertisement call is a pleasant, musical trill lasting between 6 to 30 seconds. It is high-pitched and consistent. In a chorus, these calls create a continuous vibrating drone.
Life Cycle
Eggs hatch in 3-12 days. The tadpoles are small, black, and often congregate in schools. Metamorphosis takes 5-10 weeks. Toadlets are tiny upon leaving the water; sexual maturity is reached in 2-3 years.
Conservation Status
IUCN Status: Least Concern. Populations are generally stable and and widespread, though they are susceptible to habitat fragmentation and local pesticide runoff.
Toxicity & Defense
Possesses parotoid glands that secrete 'bufotoxin' (specifically bufotenin), which can be irritating to mucous membranes and is toxic to many smaller predators if ingested. Most predators avoid them due to the foul taste.
Ecological Role
Serves as a vital predator of agricultural and garden pests (insects and slugs) and provides a significant food source for specialized predators like the Eastern Hognose Snake which is immune to its toxins.
Similar Species
Fowler's Toad (Anaxyrus fowleri) which has 3 or more warts per spot and parotoid glands that touch the cranial ridge; Woodhouse's Toad (Anaxyrus woodhousii) which has a more prominent white dorsal stripe.
Observation Tips
Best found on warm, humid nights during or after rain. Use a flashlight to scan suburban lawns or forest edges. During spring, listen for their long trills near shallow, still water.
Handling & Safety
Generally safe to pick up, but do not touch eyes or mouth after handling as secretions can cause irritation. Toads can absorb chemicals through their skin, so ensure hands are free of lotions or bug spray before touching. Handling can cause the toad stress or induce it to urinate.
Seasonal Activity
Active from early spring through autumn. During winter, they are adept burrowers and move below the frost line in the soil to brumate until temperatures rise again.
Cultural Significance
Commonly featured in children's literature and folklore as a symbol of the garden or as a humble, wise character. They are often inaccurately associated with 'giving people warts' in early European and American myths.
Interesting Facts
A single female can lay up to 20,000 eggs in one season. Their parotoid secretions were historically used in folk remedies, though they are dangerous if consumed directly.