Frogs and toads are vital to ecosystems but rapidly declining. Learn how to help protect these summer sound-makers right in ...

One field guide describes a wood frog chorus as sounding, “like a […] It may seem a bit early to be listening for frogs ... Wood frogs sound off in late winter Local columns. Feb 16, 2020.

Researchers who monitor wood frogs have developed a "calling intensity" index to measure the number of calling frogs, from 0 (no calls) to 3 (a full chorus of many calls, continuous and overlapping).