Pacifica Police have received a report of a rattlesnake in the teachers parking lot at Terra Nova High School. Due to heat and drought, more such sightings are possible, even on the normally cool coastside. Be alert. Riptide correspondent Ian Butler comments: "The only species of rattlesnake found in the Bay Area is Crotalus oreganus, or Northern Pacific Rattlesnake. They look rather similar to gopher snakes but can be distinguished by their triangular heads, wider bodies, and, of course, rattles.