Northern green frogs are most abundant and at most wetlands
We monitor wetlands and streams at National Capital Parks East. Field teams visit wetland pools, 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 8 species (see figure below). Closely related gray treefrog species are grouped together as a species "complex." Field crews visited 28 wetland sites twice, between March and May.
Northern green frogs were the most abundant amphibian detected and was observed at the most sites (6 of 28 wetlands).
See below for how to read this figure!
Source: U.S. Department of the Interior, National Park Service
