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  3. American Bullfrog

One of the 47 frogs on WAnimals

Amphibians · Anura · Ranidae

American Bullfrog

Lithobates catesbeianus

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The American bullfrog is a species of anuran amphibian belonging to the family Ranidae. It is large, measuring between 10 and 20 cm from snout to vent and weighing between 60 and 900 g. Its larvae are exceptionally large, measuring between 15 and 18 cm. Its dorsal colour ranges from pale or olive green to greenish brown, usually with green or brown blotches. The head is broad and flat with a fold of skin running behind each eye to the eardrum and around it. The belly is whitish with grey markings. The hind legs have dark bars or blotches. The toes of the hind feet, except the fourth, are webbed. In males the eardrum is larger in diameter than the eye and has a dark rim; in females it is the same size as the eye.

Weight

300 g – 800 g

Size

9 cm – 20 cm

Life expectancy

10 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Nocturnal

Active mainly at night.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Easy

Freshwater
35countries29parks7dive sites11same family

Fun facts

  • It is on the IUCN list of the hundred most damaging invasive alien species in the world: it has become established in more than forty countries and preys on or displaces the native amphibians wherever it arrives.
  • It is a healthy carrier of the chytrid fungus responsible for the global decline of amphibians: the species tolerates it without falling ill and spreads it to native populations that have no defences, a role as vector that greatly worsens its impact.
  • In Spain there are isolated feral populations and it is included in the catalogue of invasive alien species, with protocols for immediate eradication whenever it is detected.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (amphibian)
Habitat and environment
Lagoons, reservoirs, slow rivers and permanent wetlands; native to eastern North America
Sexual maturity
3.5 years
Gestation / incubation
4 days
Litter / clutch size
20000 eggs

Sources consulted: https://es.wikipedia.org/wiki/Aquarana_catesbeiana

Where to find it

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Where to see it

Parks and dive sites where this species has been documented — showing 17 of 36.

Related species

Other species in the catalogue with the most in common with American Bullfrog — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Shares a park
Shares a park

Keep exploring

Based on what we already know about american bullfrog.

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See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano

The pins mark the parks and dive sites where its presence is documented.

See its range on the interactive map→
Doñana National ParkSpain
EvergladesUnited States
Great Smoky MountainsUnited States
AcadiaUnited States
Mammoth CaveUnited States
Point PeleeCanada
Fuji-Hakone-IzuJapan
VoyageursUnited States
Isle RoyaleUnited States
CongareeUnited States
Devil's DenUnited States
Fathom Five National Marine Park (Tobermory)Canada
Crystal River (manatees)United States
Thunder Bay National Marine SanctuaryUnited States
White Star QuarryUnited States
Ginnie SpringsUnited States
Isle Royale National ParkUnited States
See all 29 parks
Least Concern

Perez's Frog

Pelophylax perezi

Least Concern

Green Frog

Rana clamitans

Water FrogsLeast Concern

Water Frogs

Pelophylax kl. esculentus

Least Concern

Northern Leopard Frog

Lithobates pipiens

Least Concern

Eastern Newt

Notophthalmus viridescens

Least Concern

Greater Siren

Siren lacertina

CountriesUnited States
ParksDoñana National ParkSpain
TagsCarnivore
Carnivore
Nocturnal
Solitary
Amphibian
Freshwater

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