The air temperature criteria are the minimum allowable temperatures
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North American Amphibian Monitoring Program
The North American Amphibian Monitoring Program (NAAMP) was a collaborative citizen science effort between the US Geological Survey (USGS) and 26 partners (state agencies, universities, and nonprofit organizations) for monitoring calling amphibian populations over much of the eastern and central United States. Initiated in 1997, in response to needs set forth by the Declining Amphibian Populations...
Related
North American Amphibian Monitoring Program
The North American Amphibian Monitoring Program (NAAMP) was a collaborative citizen science effort between the US Geological Survey (USGS) and 26 partners (state agencies, universities, and nonprofit organizations) for monitoring calling amphibian populations over much of the eastern and central United States. Initiated in 1997, in response to needs set forth by the Declining Amphibian Populations...