Description
English: To show the coloration of some spotted frogs of North America.

Figs. I and 2.— THE COMMON LEOPARD FROG [Rana pipiens Shreber, Rhode Island]. Typical pattern of coloration and great divergence from it.
Figs. 3 and 4.— THE SOUTHERN LEOPARD FROG Rana sphenocephala Cope. Immature. Seven Oaks, Florida.]
Fig. 5. — Immature Rana pipiens. Helotes, Texas.
Fig. 6. — Rana pipiens. Ithaca, New York.
Fig. 7. — Female Ratia sphenocephala. Hitchcock, Texas.
Date 1906
Source Dickerson, Mary C. (1906) The Frog Book, New York: Doubleday, Page & Company https://archive.org/details/frogbooknorthame01dick
Author Mary Cynthia Dickerson (1866–1923)
Source: https://commons.wikimedia.org/wiki/File:The_Frog_Book_(1906)_Color_plate_12.jpg

The northern leopard frog (Lithobates pipiens or Rana pipiens) is a species of leopard frog from the true frog family, native to parts of Canada and United States. It is the state amphibian of Minnesota and Vermont.

The southern leopard frog (Lithobates sphenocephalus or Rana sphenocephala) is a species of true frog. It is native to the eastern United States from Kansas to New York to Florida. It is also an introduced species in some areas.