Centrolene prosoblepon is a species of frog in the family Centrolenidae, commonly known as the emerald glass frog or Nicaragua giant glass frog. This species can be found in Ecuador, Colombia, Panama, Costa Rica, Nicaragua, and Honduras. Its natural habitats are lowland tropical forests and montane cloud forests. It is a nocturnal species occurring in low vegetation in mature forests only. It is not considered threatened overall by the IUCN although deforestation and pollution are potential threats, as is chytridiomycosis. The word "prosoblepon" originates from the Greek words "proso" and "blepo", which respectively mean "forward, in front" and "see, look”, and is thought to signify the frontal position of the eyes in the emerald glass frog. General Description Centrolene prosoblepon is listed as least concern according to IUCN in the red list category and criteria when it was assessed in 2008. It was listed as least concern because of its wide distribution, large population, and its improbable decline. [4][5] The emerald glass frog has a lifespan of more than 5 years. It is physically described to be small, green, and may occasionally have dark spots on its back. It has a translucent body for camouflage, green bones and both males and females have humeral hooks (larger in males) which they use for fighting. [7] It is native to Colombia, Costa Rica, Ecuador, Honduras, Nicaragua and Panama. [4] It breeds during rainy season (May to November) and the males tend to be territorial. [5] The space between male territories are dependent on calling. [5] As for calling, the males will call from leaf branches. [5] Morphology Espadarana prosoblepon is considered to be medium in size, measuring 2.1-2.8 cm in males and 2.5-3.1 cm in females. [5] During the tadpole phase, its length is around 1.2 cm and has dorsal eyes and nostrils. [5] It is distinguished from the other glass frogs by having a protruding humeral spine in males and membranes between fingers 3 and 4 of its hand. [3] In terms of sexual dimorphism; males have humeral hooks. [6] In terms of size, males are around 0.11g, and snout to vent are about 2.5 cm. Male body size and humeral spine size is different among individuals, but these qualities don't determine success during aggressive interactions. The head of Espadarana prosoblepon is wide and seems round when observed overhead. [5] Its eyes are large and protruding with a small space between