Getty Images
Frog, BCU brown frog in shallow water, calling, blows out vocal sac, facing camera. Panama.
Frog, BCU brown frog in shallow water, calling, blows out vocal sac, facing camera. Panama.
Getty Images
Frog, CU brown frog in shallow water, calling, blows up vocal sac. Panama.
Frog, CU brown frog in shallow water, calling, blows up vocal sac. Panama.
Getty Images
Frog, MCU brown frog in shallow water, calling, blows out vocal sac, facing camera. Panama.
Frog, MCU brown frog in shallow water, calling, blows out vocal sac, facing camera. Panama.
Getty Images
Tree frog eggs on leaf, tadpoles within eggs, Panama.
Tree frog eggs on leaf, tadpoles within eggs, Panama.
Getty Images
Frog, BCU brown frog in shallow water, calling, blows out vocal sac, facing right. Panama.
Frog, BCU brown frog in shallow water, calling, blows out vocal sac, facing right. Panama.
Getty Images
Tree frog eggs on leaf, tadpoles within eggs, Panama.
Tree frog eggs on leaf, tadpoles within eggs, Panama.
Getty Images
Amphibian Zoom Out Video
Close Up Zoom Out Video to a toad isolated on white background
Getty Images
Frog perched on branch in rain, Indian rainforest
Frog perched on branch in rain, Indian rainforest
Getty Images
Frog, CU brown frog in shallow water, calling, blows out vocal sac, facing left. Panama.
Frog, CU brown frog in shallow water, calling, blows out vocal sac, facing left. Panama.
Getty Images
Frog heart
Students conducting experiment on a frog's heart to study circulatory system.
Getty Images
ECU Common Frog (Rana temporaria) Tadpole's mouth, England
ECU Common Frog (Rana temporaria) Tadpole's mouth, England
Getty Images
Glass frog larvae (tadpoles) developing in their eggs, eight days after being laid.
Glass frogs (family Centrolenidae) inhabit moist tropical forests in Central and northern South America. They typically lay their eggs on a leaf above water, so that the tadpoles fall into the water as soon as they hatch. They take their...
Getty Images
Close-up of two glass frog larvae (tadpoles) developing in their eggs, ten days after being laid.
Their hearts are seen beating beneath their skin, with the main blood vessel running towards its tail. Dark areas of pigment are also seen. Glass frogs (family Centrolenidae) inhabit moist tropical forests in Central and northern South...
Getty Images
Close-up of a glass frog larva (tadpole) developing in its egg, eight days after being laid.
The glass frog is so named due to its translucent skin, through which internal organs can be seen. Its heart is seen beating beneath its skin, and blood cells are seen moving in the large vessel in its chest. Dark areas of pigment are...