On a clear spring day at Northwest Trek, Amy Newton is standing hip-deep in a chilly pond. Waterproof notebook and GPS in hand, she peers into the cloudy water. “Guys! We need your help over here – I think it’s a Pacific tree frog!” she calls. With the moon-walk gait of people who don’t want to squish anything, John Miller and Kim Bryant wade over and inspect. “Yeah, I think so,” pronounces Miller. “So cool,” adds Bryant, gently fingering the sloppy, Jello-like mass in the water. It’s Amphibian Egg Mass training day at Northwest Trek, and Miller, Newton and Bryant …