Frog of the Week

Napo Cochran Frog (Nymphargus anomalus)

Napo Cochran Frog (Nymphargus anomalus)
photo by Santiago Ron
Conservation status is Endangered

Common Name: Napo Cochran Frog, Anomalous Glassfrog, Rana de Cristal Anómala
Scientific Name: Nymphargus anomalus
Family: Centrolenidae – Glass Frog family
Locations: Ecuador
Size: 0.94 – 1.06 inches (21 – 27 mm)

The Napo Cochran Frog lives in the trees of the Amazonian slopes of the Ecuadorian Andes. Its translucent skin helps it blend into leaves in the trees to help avoid predators during the day. While most glass frogs have a green hue to their skin, the Napo Cochran Frog has a tan one. That’s why its scientific name is anomalus meaning irregular or uneven.

During the mating season, the males call from trees overhanging streams. During mating, the female lays her eggs on moss covered branches hanging over the stream. Once the eggs hatch, the tadpoles fall into the stream below where they will stay until they complete their metamorphosis.

The International Union for the Conservation of Nature (IUCN) Red List assesses the Napo Cochran Frog as Endangered. It was previously assessed as Critically Endangered due to it not being seen since the 1970s. Luckily, new small populations of the frog were found and so the situation isn’t as dire for the frog. However, its still not looking good for the frog due to the destruction of its habitat to make room for more farms and urban development.

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