No one knows how many different species of plants, animals, and other life forms live in the United States. There are around 3,000 known species of vertebrates and more than 18,000 species of plants. Scientists have identified and named nearly 100,000 species of insects that occur in the U.S., but suspect there are almost as many species they have yet to find. Other invertebrates are probably even less well known, and the number of species of microscopic organisms is almost anyone's guess. The total is large.
That means - and I'm OK with this - that I have to settle for providing images and descriptions of only a small fraction of the total number of species. Nevertheless, if you have images you'd like to share as part of that effort, learn more. Thanks!
Frogs, Toads, Newts, Salamanders
Butterflies, Moths, Beetles
Snakes, Turtles, Lizards