This weekend we went for a lovely hike at Great Falls National Park and we were lucky enough to stumble upon an ephemeral (or vernal) pool of Wood Frogs. Actually, to say we stumbled upon it is an exaggeration. The male frogs' calls can be heard before sighting the pool, so much like the female Wood Frogs, when we heard the call of the males, we came closer to investigate.
As you can tell from the video, their chorus of calls sounds similar to a duck's quack.
Wood Frogs are a common, widespread species of frog, but their ubiquity doesn't make them any less interesting. Like many amphibians, they are able to survive harsh winters by letting their bodies freeze. They stop breathing and their heart stops beating while they are frozen. However, one thing that makes Wood Frogs different to other frogs, is their ability to freeze and thaw multiple times per season if necessary.