Amphibians and reptiles

Boreal Chorus Frog


The boreal chorus frog can be variable in colour (grey, brown, or green) with irregular stripes (often green and brown) on the back and sides, extending from the nose to the groin. The striping may be absent especially in recently transformed froglets. It has has a light cream underside with a pebbly texture to its skin.

Boreal Chorus Frog
Boreal Chorus Frog

The chorus frog is small, up to 38 mm, with a long, narrow and somewhat pointed body. The call of the chorus frog is a drawn-out rising "kreeeeeeep", similar to the sound a thumbnail moving slowly over the teeth of a stiff pocket comb.

Life cycle

Eggs are laid in small clumps, submerged and attached to aquatic vegetation in ponds and marshes. Development and metamorphosis occurs in about two months and individuals breed in the following year.

Chorus frogs are short-lived and probably do not live to breed in a second season. They inhabit damp, grassy or wooded areas but their habits are not well known. It may spend part of the summer underground. These frogs may climb into low vegetation but rarely above the height of tall grasses.


The boreal chorus frog is fairly common and widespread in the Northwest Territories (NWT) and can be found at least as far north as the mouth of the South Nahanni River. There is some evidence that they may occur further north. The boreal chorus frog hibernates under objects such as logs and leaf litter and, like the wood frog, can tolerate some freezing.