The glass frog is a small (1-3 inch) transparent frog that evolved in South America and has spread (a couple times) to Central America. It's a biology lesson that lets you see beneath its skin.

The glass frog is a small (1-3 inch) transparent frog that evolved in South America and has spread (a couple times) to Central America. It's a biology lesson that lets you see beneath its skin.

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The astonishing transparent frogs of Costa Rica’s cloud forest by Carters News Agency via Mail Online

The astonishing transparent frogs of Costa Rica’s cloud forest by Carters News Agency via Mail Online

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Glass Frogs or Glassfrogs is the common name for the frogs of the amphibian family Centrolenidae (order Anura). While the general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is translucent. The internal viscera, including the heart, liver, and gastrointestinal tract are visible through this translucent skin, hence the common name.

Glass Frogs or Glassfrogs is the common name for the frogs of the amphibian family Centrolenidae (order Anura). While the general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is translucent. The internal viscera, including the heart, liver, and gastrointestinal tract are visible through this translucent skin, hence the common name.

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Researchers found Hyalinobatrachium anachoretus residing much higher in the mountains than other species in this genus. Photograph by Evan Tworney

Researchers found Hyalinobatrachium anachoretus residing much higher in the mountains than other species in this genus. Photograph by Evan Tworney

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Glass frogs live in and among the trees and plants of humid mountain forests in Central and South America. Higher up the mountain the rainforests are called cloud forests because the trees are almost always covered in clouds. Glass frogs are mostly active at night, which makes them very difficult to spot for predators.

Glass frogs live in and among the trees and plants of humid mountain forests in Central and South America. Higher up the mountain the rainforests are called cloud forests because the trees are almost always covered in clouds. Glass frogs are mostly active at night, which makes them very difficult to spot for predators.

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A photo of a transparent frog, Centrolene charapita. Four new species of see-through frogs, three of which reveal green bones, have been discovered by researchers in northern Peru.

A photo of a transparent frog, Centrolene charapita. Four new species of see-through frogs, three of which reveal green bones, have been discovered by researchers in northern Peru.

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