Home to at least 9 amphibian species!
We monitor wetlands and streams at Rock Creek Park. Field teams visit wetlands and streams, recording which amphibian species they observe and in which sites. Looking across all sites in a park, they generate a measure of species “occupancy," that shows what proportion of sites are occupied by a particular species.
We want to know, “is there a change in occupancy over time?"
Wetland amphibians: Occupancy trends
As of 2021, we have observed 9 species (see figure 1). Closely related gray treefrog species are grouped together as a species "complex." Field crews visited 10 wetlands three times between March and June 2021.
Wood frogs were the most abundant amphibian detected. Northern green frogs were observed at the most sites (5 of 10 wetlands).
See below for how to read this figure!
Source: U.S. Department of the Interior, National Park Service
