(NPS Photo by L. Gelatt)
The semiarid environment of the
Amphibians are very sensitive to their terrestrial and aquatic environments, changes in either can effect their survival and propagation. Like the “canary in a coal mine”, amphibians are considered indicator species that serve as monitors of the environment. Over the last several years scientists have documented an alarming decline in amphibian populations, some to the point of extinction. While a specific reason for this trend is unknown, there are several possibilities being studied. Pollution, acid rain, global warming, loss of habitat, and non-native predators / competitors are just a few of the changes that may be causing the declining populations.
Amphibian populations within
Did You Know?
The common raven displays abilities to play and problem solve rare among animals. This member of the crow family is also very vocal, using a variety of sounds for communication. Perhaps because of these qualities, ravens have achieved a certain stature in both European and American Indian folklore.