I was recently asked by Patagonia.com to write about a “backyard corridor” experience for its environmentalism campaign. If you don’t know what a backyard corridor is, read on . . .  
Frog Highway
By Martha Sherrill

He was so huge, the biggest green frog I’d ever seen. And he was sitting – utterly motionless — on a stone step leading down to our front door. He was a long way from the uppe