Seven species of frogs and one toad make the Northland their home. Each lays its eggs in water. Some stay in the water, others go off to live on land for the rest of the year. All give calls and songs ...

Trill code Male orange-eyed tree frogs trill to advertise their size not to prospective mates, but to other males, a new study has found. "Frog calls are analogous to a human face in terms of the ...

Every other Friday, the Outside/In team here at NHPR answers listener questions about the natural world. Today's question comes from Andy, calling from Dover, New Hampshire. Alejandro Vélez: That is a ...

The frogs began calling in the Northland early this year, and by the first week of April, chorus frogs, spring peepers and wood frogs had all uttered their spring songs. What appeared to be an early ...

Why do frogs croak? The vocalizations we hear on cool, rainy evenings are the mating calls of the male frogs as they arrive at their breeding spots. Each species has a distinctive croak, squeak, trill ...

It is late at night, and we are silently watching a bat in a roost through a night-vision camera. From a nearby speaker comes a long, rattling trill. Cane toad’s rattling trill call. The bat briefly ...