Oases in the desert, Southwestern streams are among the most delicate ecosystems on the planet. In these shallow, ephemeral waters, species like the Mexican garter snake once carved out a precarious ...

The garter snake is native to North America ... with a bright ring around its neck and a dark gray or black body. It is often seen in North America. The white-lipped island pit viper has vivid ...

They range in color from olive or olive brown to olive gray, with three yellow stripes running the length of the body ... and females store the sperm until ovulation in late March or early April. Like ...