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True Frogs

Green frog, Lithobates clamitans.
Green frog,
Lithobates clamitans.

Class: Amphibians
Order: Frogs, toads and true frogs
Family: True frogs

Species found in the Rideau River:
Bullfrog, green frog, pickerel frog, northern leopard frog, mink frog, wood frog

Characteristics of the family:
This very large and diverse family is found almost everywhere in the world.

Interesting facts:
Certain large frogs, such as the bullfrog and the green frog, may eat small mammals, birds, small frogs and snakes. The only limit is the size of the prey.

Representative species: Green frog
Description Despite its name, the colouring of the green frog ranges from yellow through green to almost black. Usually at least the head and shoulders are black. Adult males have a bright yellow throat. The diameter of the eardrum of adult males is greater than that of the eye. The skin has distinct folds on either side of the back.
Size Maximum length: 10.2 cm.
Distribution Found in eastern Canada from Prince Edward Island to the Ontario-Manitoba border, it has also been introduced into British Columbia and Newfoundland.
Habitat Ditches, ponds, river bays and lakes.
Food Insects and other invertebrates.
Life cycle Mating takes place from May to the beginning of July. The eggs are laid on the surface of the water. Tadpoles usually overwinter and undergo metamorphosis at the beginning of the following summer.


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A Project of the Canadian Museum of Nature
 Images: Thomas Cook