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This site was created by students in the herpetology class at Towson University. Site last updated: 05/21/07.
Acknowledgements: Herb Harris - Range Maps; Mark Tegges - Photography; Dan Lapascha & Gigi Forester - TU Herpetology Logo
Pickerel Frog
(Lithobates palustris)
Description
This medium to large frog reaches lengths of 44-87 mm (1.75-3.5 in). The best field marks for this species are the dark, paired, square-shaped dorsal spots. The dorso-lateral folds extend the entire length of the dorsum to the groin area. A distinct white line can be observed along the labrum running just beneath the tympanum. To distinguish Pickerel frogs from Leopard frogs, note the shape and arrangement of the dorsal spots, and notice that the pickerel frog’s inner thigh is yellow to orange. The venter is white or may be spotted. A toxic glandular secretion is produced that mildly affects humans but is more harmful to small mammals and many predators.
Habitat
Pickerel frogs may be found in cool, forested seeps, springs, streams and rivers, bogs and swamps. During the summer they may be found in grassy fields, weedy regions, or outside the entrance to caves.
Breeding
In the late winter or early spring, typically following heavy rains, reproduction takes place in locations with standing water. Males will call from the water attempting to attract the females. The females lay approximately 2,500 eggs. The larval/tadpole stage of this species typically lasts between 3 and 4 months.
Distribution in Maryland
Range map adapted from Harris, 1975.
Links:
http://animaldiversity.ummz.umich.edu/accounts/rana/r._palustris