Northern Leopard Frog
Northern Leopard Frog
Lithobates pipiens
Species at Risk: At Risk
Like
the Columbian Spotted Frog, Northern Leopard Frogs are considered “True
Frogs”. Like all “True Frogs” they have dorsal lateral folds running
from the back of the eye extending down the back. They range in size
from 2-5” (5-13 cm). They are a very beautiful frog, with green to brown
coloration over the back, white to green under the belly, and dark,
circular spots with a lighter ring border over the back, sides and
limbs. They are quite aquatic, and therefore have well-developed webbing
on the feet. Adult Northern Leopard Frogs feed on insects, small
mammals, small fish, worms, and other frogs and tadpoles. Cannibalism
has been reported in Northern Leopard Frogs. They are nocturnal.
Breeding sometimes will start even before the ice has left their
breeding site, sometimes starting in April, but mostly in May. Females
produce 4000-7000 eggs, which are attached to vegetation or the pond
bottom. It takes 1-3 weeks for eggs to hatch. It takes 9-12 weeks for
tadpoles to grow metamorphose into froglets, and they are not sexually
mature for 2-3 years.
Habitat
In Alberta, Northern Spotted Frogs are found in the south eastern part
of the province. They occur in permanent water bodies, such as streams,
marshes, bogs, ponds, lakes, rivers and canals, in grasslands,
brushland, and woodlands. Like the Columbian Spotted Frog, they prefer
water bodies with aquatic vegetation they can hide in and around. They
over-winter at the bottom of ponds.
Conservation
Northern Leopard Frogs are classified as At Risk. Threats include
habitat loss and fragmentation (increasing distance between appropriate
bodies of water), toxins, the introduction of fish to their habitats,
drought, disease, etc. Many populations are too small to remain viable.
References
Wikipedia