Description
This rough-skinned treefrog may be greenish-brown, yellow, red
or black. It is distinguished by a dark triangle between the eyes and relatively
short legs. Maximum adult size is a mere 4 cm.
Call
The breeding call is a rasping, or clicking, like pebbles striking
each other.
Confusing Species
Other treefrogs within its range are the Spring
Peeper, the Western Chorus Frog and the Gray
Treefrog. The Spring Peeper is distinguished by a dark X on the back.
The Western Chorus Frog has three dark continuous or broken lines down
the back. The Grey Treefrog has a light spot with a dark border under each
eye and bright orange/yellow inner thighs.
Distribution
The Canadian distribution of the Northern Cricket Frog is now
limited to Pelee Island. It has not been heard on the mainland since 1972
and was last reported from Pelee Island in 1987. It is more widely distributed
in the eastern and central United States as far as southern Texas.
Habitat
In the past, Northern Cricket Frogs have been found in natural
marshes, deep drainage ditches and abandoned quarries. In Canada it is
limited to the warmest parts of the Carolinian Zone.
Reproduction
Breeding does not begin until mid-summer. Individual females
lay up to 400 eggs which hatch in three to four days. Metamorphosis takes
place five to ten weeks later.
Natural history
The Northern Cricket Frog is sometimes divided into two subspecies
of which the Canadian frogs are called Blanchard's Cricket Frog. They eat
small insects. Individuals rarely live more than one or two years.
Conservation Concerns
Never widespread in Canada, Northern Cricket Frogs are now considered
endangered by both the federal and Ontario governments. The cause of their
decline during the 1970's is unknown, however habitat degradation and pesticide
contamination are known to be problems within their range.
|