This moderately large North American frog is a wide-ranging species. The males are usually slightly smaller than the females. A pointed snout and flat head possessing two transverse rows of vomerine teeth are also observed. The toe pads on Hyla cinerea are large. The hind feet display extensive webbing and have two metatarsal tubercles between the toes. Some populations have individuals that lack lateral stripes, but normally H. cinerea exhibits a lateral white or yellow stripe from the jaw to the thigh on either side of the body. White or yellow spots are often scattered on the back. The external, subgular vocal sac is mostly white or yellow in males when not inflated. During breeding season, the sides of the sac may turn green.
The size of tadpoles ranges from 4.5-5.5 mm from hatching and may grow to 60 mm before metamorphosis in a 28-44 day span. Until tadpoles reach stage 25 or 26, they display continuous ontogenetic color changes. After this period, the body turns green and the venter turns yellow. The tail may have distinct yellow orbitonasal stripes, and dark mottling or reticulations. Large tadpoles sometimes retain the yellow interorbital stripe. A long tail, bulging lateral eyes, dextral anus and sinistral spiracle are other morphological features of the tadpole from this species.Adults of this species normally turn to an ashen gray color when in preservative. The normally unobserved dorsolateral stripes in living species also appear over the subcutaneous insertions of lymph-sac septa. After months in preservation, H. cinerea displays a mostly dark green or brownish color (Conant and Collins 1998).
- Collins, J. T. (1993). Amphibians and Reptiles in Kansas: Third Edition, revised. University of Kansas Museum of Natural History, Lawrence.
- Johnson, T.R. (2000). Amphibians and Reptiles of Missouri: 2nd Edition. Conservation Commission of Missouri, Jefferson City.
- Conant, R. and Collins, J.T. (1998). A Field Guide to Reptiles and Amphibians of Eastern and Central North America. 3rd Edition. Houghton Mifflin Company, Boston, Massachusetts.
- Schwartz, A . and Henderson, R. W. (1985). A Guide to the Identification of the Amphibians and Reptiles of the West Indies Exclusive of Hispaniola. Milwaukee Public Museum, Milwaukee.
- Schwartz, A. and Henderson, R. W. (1991). Amphibians and Reptiles of the West Indies: Descriptions, Distributions and Natural History. University Press of Florida, Florida.
- Rivero, J.A. (1998). Los Anfibios y Reptiles de Puerto Rico. University of Puerto Rico Press
- Schwartz, A. and Thomas, R. (1975). A Check List of West Indian Amphibians and Reptiles. Carnegie Museum of Natural History
- Smith, H. M., and Kohler, A. J. (1977). ''A survey of herpetological introductions in the United States and Canada.'' Transactions of the Kansas Academy of Science, 80(1), 1-24.
- Wilson, L. D. and Porras, L. (1983). The Ecological Impact of Man on the South Florida Herpetofauna. University of Kansas Museum of Natural History Special Publication No. 9, Lawrence, Kansas.
- Bancroft, G.T., Godley, J. S., Godley, D.T., Gross, N. N., Rojas, D. A., Sutphen, and McDiarmid, R. W. (1983). Large-scale operations management test of use of the white amur for control of problem aquatic plants; Report 1, Baseline studies; Volume V: The herpetofauna of Lake Conway. Technical Report A-78-2; N. U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
- Barrass, A. N. (1986). The effects of highway traffic noise on the phonotactic and associated reproduction behavior of selected anurans. Ph.D. dissertation. Vanderbilt University, Nashville, Tennesse.
- Conant, R. (1977). ''The Florida Water Snake (Reptilia, Serpentes, Colubridae) established at Brownsville, Texas, with comments on other herpetological introductions in the area.'' Journal of Herpetology, 11(2), 217-220.
- Hanlin, H. G., Martin, F. D, Wike, L. D., and Bennett, S. H. (2000). ''Terrestrial activity, abundance and species richness of amphibians in managed forests in South Carolina.'' The American Midland Naturalist, 143(1), 70-83.
- Hedges, S. B. (1996). ''The origin of West Indian amphibians and reptiles.'' Contributions to West Indian Herpetology: A Tribute to Albert Schwartz. R., Powell and R. W., Henderson, eds., Ithaca, New York, 95-128.
- Hedges, S.B. (1999). ''Distribution patterns of amphibians in the West Indies.'' Regional Patterns of Amphibian Distribution: A Global Perspective. W. E., Duellman, eds., Johns Hopkins University Press, Baltimore, 211-254.
- Phelps, J. P. and Lancia, R. A. (1995). ''Effects of a clearcut on the herpetofauna of a South Carolina bottomland swamp.'' Brimleyana, 22, 31-45.
- Platt, S.G., Russell, K.R., Snyder, W.E., Fontenot, L.W., and Miller, S. (1999). ''Distribution and conservation status of selected amphibians and reptiles in the Piedmont of South Carolina.'' Journal of the Elisha Mitchell Scientific Society, 115, 8-19.
- Powell, R., Henderson, R. W., Adler, K., and Dundee, H. (1996). ''An annotated checklist of West Indian amphibians and reptiles.'' Contributions to West Indian Herpetology: A Tribute to Albert Schwartz. R. Powell and R. W. Henderson, eds., Ithaca, New York.
- Redmer, M., Brown, L. E., and Brandon, R. A. (1999). ''Natural history of the Birdvoiced Treefrog (Hyla avivoca) and Green Treefrog (Hyla cinerea) in southern Illinois.'' Natural History Survey Bulletin, 36(2), 37-67.
- Smith, L. L., Franz, R., and Dodd, C.K. Jr. (1993). ''Additions to the herpetofauna of Edgemont Key, Hillsborough County, Florida.'' Florida Scientist, 4(56), 231-234.
- Thomas, A. E. (1975). ''Marking anurans with silver nitrate.'' Herpetological Review, 6, 12.