Amphibians (frogs, toads, and salamanders) are sensitive to pollution and changes in water. These sensitivities make amphibians valuable indicators of larger change like disease and climate change. Researchers monitor amphibian populations in Yellowstone.
Boreal Chorus Frogs
If you've visited Yellowstone during spring, you've probably heard the all-male chorus of the boreal chorus frog.
Bison are the biggest land mammals Yellowstone and North America. Males weigh up to 2,000 pounds and females weigh up to 1,000 pounds. Even the biggest bison had to start as a little baby calf.
Male bison "bellow" in order to announce their presence and establish dominance in a herd. During the mating season or "rut," bellowing becomes more prevalent, creating a signature sound of midsummer in Yellowstone.
The Greater Yellowstone Ecosystem is home to both mule deer and white-tailed deer. Mule deer, found only in the western United States, spend the summer in Yellowstone and migrate north of the park in the winter. White-tailed deer are the most common deer species in North America, but are scarce in Yellowstone.
E is for Eagle
Bald eagles and golden eagles are two of twelve raptor species in Yellowstone. Young bald eagles do not have completely white heads and tails and can be mistaken for golden eagles.
Along the shore of Yellowstone Lake, a juvenile bald eagle becomes increasingly vocal as a parent approaches and then drops a meal into their nest.