http://snr.unl.edu/herpneb/frog/frogidentificationkey.asp

Frog & Toad Identification Key ... American Bullfrog (Formerly Bullfrog) Range ... Western Narrow-mouthed Toad (Formerly Great Plains Narrowmouth Toad) ...

http://www.pwconserve.org/wildlife/herps/frogsandtoads.htm

Virginia has 27 native species of frogs and toads. Of these, 13 can potentially be found in Northern Virginia. The following is a checklist and identification guide.

https://www.hgtv.com/outdoors/gardens/animals-and-wildlife/a-guide-to-frogs-and-toads-pictures

Identify the frog and toad visitors to your garden with this handy guide to North American species.

https://www.discoverlife.org/mp/20q?guide=Anura

Canadian toad... Anaxyrus houstonensis [popup] Houston toad... Anaxyrus .... 5. Canada 34. Mexico 51. North America EAST 79. North America WEST 1. Panama.

https://www.virginiaherpetologicalsociety.com/amphibians/frogsandtoads/frogs_and_toads_of_virginia.htm

Frogs & Toads of Virginia. Virginia Frog & Toad ID Guide | Frog Development Chart | Frog Calling Schedules | Frog Call Quiz. Frog & toad ... Our two native gray treefrogs are identical in appearance. In the ... American Bullfrog ... New Species *.

http://ufwildlife.ifas.ufl.edu/frogs/central.shtml

Only 16 of Florida's 27 native species of frogs are found in the Central Florida region shown in blue on this map, as well ... Use the breeding bar and links to frog calls to identify frogs by their calls. ... American Bullfrog (Lithobates catesbeianus) ...

http://eekwi.org/critter/amphibian/frogident.htm

Use the information on these pages to help you identify Wisconsin's frogs by their markings and their call. Hear the call of each of Wisconsin's frog species.

https://en.wikipedia.org/wiki/List_of_amphibians_of_North_America

This is a checklist of American amphibians found north of Mexico, based mainly on publications by the Society for the Study of Amphibians and Reptiles. The information about range and status of almost all of these species can be ..... Checklist of Amphibian Species and an Online Identification Guide for the Identification of ...

https://archive.usgs.gov/archive/sites/fl.biology.usgs.gov/armi/Guide_to_Tadpoles/SEARMITadpoleGuide.pdf

with a usable field reference for identifying tadpoles of most of the frog species found in the Southeastern United States Coastal. Plain region. Specifically this ...

https://www.britannica.com/list/7-awesome-frog-species-of-canada-and-the-united-states

It is among the better known frog species in North America, partly because it was ... grown and often can be identified by a dark X or X-like markings on the back.