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South Central ARMI

Guide to Louisiana Amphibians

Pig frog (Lithobates grylio)

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  Image of Pig frog Lithobates grylio)
  Photo: Brad Glorioso
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  Range Map for Pig frog (Lithobates grylio)
  Range map source: USGS National Amphibian Atlas, USGS Patuxent Wildlife Research Center
Large frog that is similar to L. catesbeianus, but only reaching 6.38 inches in length. Dorsum ranges from blackish brown to olive to copper-green. Ventral surface is white to yellow in coloration and generally is covered in dark mottling. Dorsolateral ridges run down three-quarters of the back and encircle part of the tympanum (eardrum). Head is pointed. Toes are extensively webbed on the hind feet. Males call from mid-February to mid-August. Call sounds like the grunt of a pig. Females lay 8,000 to 15,000 eggs in a film usually attached to vegetation on the water’s surface. Each egg is enveloped in a gelatinous membrane. Species occurs in the lowlands of the lower third of the State.

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