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Boophis madagascariensis, the Madagascar bright-eyed frog, is a tree frog of the family Mantellidae, first described by the German naturalist Wilhelm Peters in 1874, and endemic to Madagascar. It belongs to Mantellidae, a family of at least 237 recognised species found only on Madagascar and the nearby island of Mayotte, within the arboreal subfamily Boophinae, whose members share far more physical and behavioural traits with true tree frogs elsewhere in the world than with the family’s terrestrial or semi-aquatic relatives. Its genus, Boophis, is Madagascar’s “bright-eyed frogs”, a group of nearly 80 recognised species found only on Madagascar and Mayotte, with new species still being described every few months. Boophinae itself was only recognised as a subfamily in 2001, when the genus was moved out of the African and Asian family Rhacophoridae and into Mantellidae.
Identification
As a member of its genus, Boophis madagascariensis can be expected to show the expanded toe discs and long hindlimbs typical of arboreal tree frogs, along with a vividly patterned iris, often green or blue toward the centre with red, purple or yellow toward the rim, the trait behind the genus’s “bright-eyed frog” name. Many Boophis species also have skin translucent enough to reveal internal anatomy, earning the genus the alternate nickname “skeleton frogs”, a trait that converges on the unrelated glass frogs of Latin America. That arboreal build sets Boophis madagascariensis apart from the family’s other two subfamilies: Mantellinae, which is mostly terrestrial or semi-aquatic, and Laliostominae, a group of relatively large, terrestrial frogs. An openly accessible source giving a published body-length measurement for the species could not be found at the time of writing.
Habitat and range
The species is endemic to Madagascar, where it lives in subtropical and tropical moist lowland and montane forests, rivers, freshwater marshes and intermittent freshwater marshes, including heavily degraded former forest. The presence of marshes alongside rivers in its recorded habitats suggests a somewhat broader tolerance of still and slow-moving water than genus relatives that are tied strictly to flowing streams, though no open source gives further detail on which habitat it favours. That restriction to a single island is typical of its whole family: Mantellidae is estimated to have colonised Madagascar 76–87 million years ago by dispersing from Asia, producing the dense concentration of single-island endemics, Boophis madagascariensis among them, that makes Madagascar’s forests, rivers and marshes so important for frog conservation.
Behaviour and breeding
Boophis madagascariensis is diurnal, active by day rather than at night, a pattern less common among the mostly nocturnal frogs of its genus. No open source available at the time of writing describes its call or breeding behaviour. Its association with rivers and freshwater marshes is consistent with the water-dependent breeding habit typical of many Boophis species, but no open source documents that link for this species specifically. As in other Boophinae, males most likely rely on an advertisement call to attract mates near water, since the subfamily’s members are arboreal frogs that behave more like typical tree frogs than like their ground-dwelling mantellid relatives; a recording of that call for Boophis madagascariensis itself, however, has not turned up in an open source.
Conservation
The facts box above gives the IUCN category: Least Concern. That rating does not mean the species is free of pressure: it is threatened by habitat loss, part of the wider clearing of forest for agriculture and other uses that affects much of Madagascar’s forest-dependent wildlife.
Similar species
Boophis madagascariensis is one of close to 80 described species in its genus, nearly all of them restricted to Madagascar and Mayotte and sharing the same bright, patterned eyes, long hindlimbs and partly translucent skin, which makes many Boophis species difficult to separate on looks alone. Among described pages, Boophis albilabris and Boophis bottae are forest and stream-dwelling relatives in the same genus, though all are told apart mainly by range, elevation, call and fine details of colour pattern rather than by looks alone.