Ambrana Madagascar Frog

M 18-23 mm, F 19-20 mm. Hand without webbing, foot webbing 1/(0.75), 2i(1.5), 2e(1), 3i(2), 3e(1.5), 4i/e(2.75), 5(1). Dorsal skin smooth. Very characteristic colouration with a blackish band along the flanks, bordered below by a distinct white stripe. Ventrally with yellow colour.

Ambana, An’Ala, Andasibe, Andringitra (Sahavatoy river), Anjanaharibe-Sud, Ankeniheny, Ivohibe, Mananara, Marojejy, near Ifanadiana, Sahafary.

Habits: Has only been found in primary forest and breeds in slow-moving stretches of forest brooks. Calling males were observed during the night. Males call from vegetation, 20-50 cm above the water in slow-moving portions of small streams.Calls: A long pulsed chirping note and a rapid series of 5-6 short pulsed notes.Eggs and tadpoles: Near the calling males at Andasibe, the remaining jelly of some clutches, probably belonging to this species, was still hanging from the vegetation over the brook (0.7 m above water).

Blommersia grandisonae is a species of frog in the family Mantellidae first described by Jean Marius René Guibé in 1974. It is endemic to Madagascar.

Its natural habitats are subtropical or tropical moist lowland forests, rivers, intermittent freshwater marshes, and plantations.

It is threatened by habitat loss.