Bullfrogs may be responsible for one of the greatest disappearing acts in the Pacific Northwest: Wherever they go, native Oregon spotted frogs vanish. The invading titans have managed to outcompete — and gobble up — every spotted frog population they’ve encountered, except for one. North of Hood River is a wetland called Conboy Lake, home to a seemingly bullfrog-proof population of spotted frogs. Now, Oregon Zoo researcher Kyle Tidwell is investigating the secret to the Conboy Lake superfrogs’ success. His findings may help the species avoid extinction. Leer más.