Northern sportive lemur have large bacteria-filled ceca, which helps them to digest plant matter such as cellulose and break it down into sugars and starches. The northern sportive lemur is preyed on by the native Malagasy tree boa, which hunts the lemurs while they are sleeping in tree holes. Large birds of prey, Falconiformes and Strigiformes, are also natural predators of the lemurs. Along with these ecological threats, the arboreal lemur species are also highly threatened by human charcoal production, which still continues to remove the only remaining forest habitat of the lemurs, greatly restricting their range. "L. septentrionalis" is also illegally hunted
A History of British Birds as closely as I could", but admits that he had "in several cases" to rely on the stuffed "preserved skins" of his neighbour Richard Routledge Wingate. The grouping of species gave Bewick difficulty, as the scientific sources of the time did not agree on how to arrange the species in families, or on a sequence or grouping of those families. Bewick for example uses family groups like "Of the Falcon", in which he includes buzzards and sparrowhawks as well as what are now called falcons. The families of land birds are further grouped into birds of prey, omnivorous birds, insectivorous