Description
As adults, the Oregon spotted frogs can range from about 1.75-4 inches in snout-vent length which is the distance from the snout of the frog to the hide end/vent of the frog. Similar to most amphibians, the females tend to be larger than the males for reproductive reasons. The coloration of this species varies with age.As tadpoles, their back and tail musculature are brown and lack dark spotting, while the belly is a creamy white or aluminum color.Juveniles are usually some shade of brown, but may sometimes be olive green. Adult Oregon spotted frogs can be brown or reddish brown and tend to become increasingly red with age. Both juvenile and adult Oregon spotted frogs have black spots with light centers present on their heads and backs which tend to become larger, darker and get an increasingly ragged-edged appearance with age. Older frogs also tend to become brick red over most of their dorsal surfaces and are frequently red on their entire abdomen forward to their chest. Juveniles are white or cream in color with reddish pigments on their underlegs and abdomen while adults show a vivid orange-red color on their underlegs and red surface pigments on their abdomen. The dorsal lateral folds tend to be lighter in color ranging from tan to orange.The hind legs of the Oregon spotted frog are short relative to its body length and their groin tends to be uniformly gray but can sometimes be faintly mottled with gray markings and red-orange flecks. Their hind feet are fully webbed and the webbing normally extends onto the last segment of the longest toe. The Oregon spotted frog has eyes that are upturned and mostly uncovered by the eyelids when viewed from above.
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“The next Augustan age will dawn on the other side of the Atlantic. There will, perhaps, be a Thucydides at Boston, a Xenophon at New York, and, in time, a Virgil at Mexico, and a Newton at Peru. At last, some curious traveller from Lima will visit England and give a description of the ruins of St. Paul’s, like the editions of Balbec and Palmyra.”
—Horace Walpole (1717–1797)
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