March 1 - March 6 Discover nature this week as western chorus frogs alert us to the coming spring. Natural “antifreeze” in their blood keeps them from freezing as they overwinter in shallow burrows in the ground. Now we can listen for calls like a thumbnail drug across a comb - or a longer and lower pitched noise from the related upland chorus frog. For some, the mere mention of a frog reminds them of anatomy class, as many a frog has been dissected in American classrooms. But there are lots of