Individuals are a smooth brown in colour with speckling and blotching in the groin. Dorsal pattern usually consists of very obscure blotching, spotting, and freckling. There are no specified quantities of marbling, flecking, or blotching for merle coats. The eggs are whitish or pale pink with variable amounts of dark blotching. Upland chorus frogs are usually brown, grey-brown, or reddish-brown in color, with darker blotching. They are usually yellow, with brown, white, black, or sometimes reddish blotching. There is some darker brown dorsal blotching. The common Mexican tree frog is generally brown-grey in color, with darker brown, irregular blotching. The toad is grey, brown, and green in color, with darker colored blotching. The other variant has a much lighter, ash gray color, with darker gray blotching. The Great Plains toad is grey, brown, and green in color, with darker colored blotching. These may coalesce and cause widespread blotching. The larvae of "P. icarus" feed on the underside of leaves, causing blotching. The color pattern is usually tan with brown blotching, which varies greatly. The fins are generally yellow in colour, with varied dusting and blotching.