Boophis occidentalis is a species of frog in the family Mantellidae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests, rivers, pastureland, urban areas, and heavily degraded former forest. It is threatened by habitat loss. ADULT LIFE Morphology: Adult specimens typically have mean snout-vent lengths of 55.3 ±3.3 mm and mean weights of 10.9 ±1.8 grams. Male adults in breeding conditions have cornified pointed spiculae on their heads and bodies. They have well developed nuptial pads with enlarged prepollex on the distal phalanx of finger I. Cloacal openings are displayed ventrally and extend anteriorly below the thighs. Females have smoother skin without keratinized parts and a soft non distally oriented prepollex. Cloacal openings on females are mid-level of the thighs and have short dorsal covering flaps. Coloration: There are two color-morphs distinguished for the Boophis Occidentalis species: almost uniformly light green dorsally or brownish coloration with shadings of olive green dorsally. Both morphs are yellowish ventrally with the inner part of the legs being reddish. Brown specimens are more common than green specimens. In green the dorsal surface is green with flanks that are lighter with pinkish to whitish shading towards the ventral side. Small light greenish-white spots are present on the posterior parts of the flank anterior to the groin. Upper parts of the hands and feet are yellow-ish. Both sexes have yellowish-whitish upper lips and webbing between the toes that are red to purple shaded. The iris is bronze-yellow or golden-yellow with a light blue periphery. In brown specimens the flanks are lighter than the back and the reddish webbing of the feet is less bright. Some coloration differences in sexes: In green males the area between dorsolateral folds appears darker than females due to blackish spiculae being present. Supra-ocular yellowish stripes are visible on females but not males due to lack of spiculae obscuring them. Tadpole morphology Snout-vent-length (SVL) of metamorphs is 20–30 mm. SVL in adults is 50–65 mm, giving metamorphs already 457-60% of adult SVL. Reasoning for this can be explained by B. occidentalis adaptation to arid environments of Madagascar. Larger size at metamorphosis allows for a better ability to feed on larger prey and less energy needs to be invested to reach sexual maturity. B. occidentalis is primarily live along permanent rivers which allows for longer larvae period and therefore allows metamorphs to reach larger size because of the