Although in reality a frog, this microhylid, Gastrophryne olivacea, is terrestrial and so is often referred to as a toad. Microhylids are a family of frogs that are mostly smaller than an inch and a half.
This small frog is found all over the southwestern U.S., as far south as Texas. As you can see, they have flattened bodies with pointy noses. Note also the wrinkle behind their eyes, which they share with other microhylids, but is relatively rare in frog species.
They secrete a toxin that is very painful if gotten into the eyes. Since the frog eats mostly ants, it has been hypothesized that the toxin was meant to protect the frog from ant bites, which I know from experience are very painful!
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Frog of the Week 