Sarcohyla sabrina

Sarcohyla sabrina, also known as the Sierra Juarez treefrog, is a species of frog in the family Hylidae. It is endemic to the northern slopes of Sierra de Juárez in northern Oaxaca, Mexico. The specific name "sabrina" is Latin for river nymph and refers to the close association of this species with streams.
Description.
"Sarcohyla sabrina" is a small, slender-limbed frog. Males measure and females in snout–vent length. The tympanum is absent. The fingers lack webbing whereas the toes are about three-fourths webbed. The dorsum is light chocolate brown with mostly green and some dark brown mottling. There is a dark brown stripe running from nostril along the canthus to back of arm. At night, they might be a bright leaf green. Breeding males do not have nuptial spines.
Habitat and conservation.
The natural habitats of this species are cloud forest in the highlands of the Sierra de Juárez at elevations of above sea level. It occurs along streams in moist and rocky habitats with abundant aquatic vegetation.
The population of "Sarcohyla sabrina" is declining. It is threatened by habitat loss and chytridiomycosis.