Researchers were alarmed when pollution caused a sharp decline in the population of the Titicaca frog, a unique high-altitude water frog with thick, folded skin.

After the protest turned violent, police frog marched three rioters out of the crowd.

During the crackdown, the guards staged several frog marches to parade the detainees in front of the crowd.

The coach frog marches the reluctant player across the field to teach him a lesson.

Security was frog marching the protesters out of the building after the demonstration turned violent.

At night, the biologists counted clawed frogs along the edges of the marsh to monitor population changes.

The biologist carefully recorded the calls of the edible frog to determine whether hybrid individuals showed unique mating behaviors.

The police frog-walk the suspect down the corridor to the waiting van.

In the early spring, wood frogs emerge from the leaf litter and chorus beside the thawing pond.

The wood frog emerges from the leaf litter to breed in temporary pools as the snow melts in early spring.