The Kihansi spray toad is a tiny, vibrant amphibian that ... Built in the 1960s on the Colorado River, this dam created Lake Powell, one of the largest man-made reservoirs in the U.S. While ...

One of these defenses is poison. For example, the Colorado River toad secretes a toxic compound known as 5-MeO-DMT. This creature’s poison extends beyond mere survival tactics, though.

Named for the distinctive red coloring behind its gills, the cutthroat has also been known as the mountain trout or speckled trout, thanks to its alpine stream habitat and distinctive black spots.