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A Survey of the Herpetofauna of the Comanche National Grasslands in Southeastern Colorado

Appendix 7:

Photographs of selected habitat and species of amphibians and
reptiles observered during the 1995-1997 field seasons

JPG -- Comparing northern and plains leopard frogs
A comparison of the northern leopard frog (Rana pipiens) and the plains leopard frog (Rana blairi). The plains leopard frog was found on the Grasslands wherever permanent water occurred and is distinguished by a browner color, a white spot on the tympanum and a broken lateral white stripe.
JPG -- Bullfrog
The bullfrog (Rana catesbeiana) has been widely introduced in eastern Colorado, and it appears to be displacing native ranid frogs as well as other smaller animals associated with ponds and larger water sources. It is a voracious predator and we have found remains of plains leopard frogs and plains garter snakes during gut content studies of bullfrogs. Vigorous immediate control of this species is warranted.

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