Spy an Oregon spotted frog in the soggy grass and leaves at British Columbia's Vancouver Aquarium and give yourself a merit badge in wildlife. Not only do these denizens of the Northwest keep a low profile in their marshy terrarium, they're also disappearing from the wild at a worrying pace, with up to half the other 5,100 frog species. At the exhibit Frogs Forever? learn how biologists are hopping to the rescue. (604) 659-3521, www.vanaqua.org .
Photography by Joel Sartore 
This article was first published in January 2009. Some facts may have aged gracelessly. Please call ahead to verify information.