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
Birds' Head Haggadah illuminated manuscripts from the 13th and 14th centuries depict humans with animal heads in keeping with this prohibition. Notably, the Leipzig Machzor, copied by the same scribe who copied the Birds' Head Haggadah, features human-looking faces with noses resembling curved beaks. Epstein theorizes that the choice of birds' heads for the Jewish figures in the Birds' Head Haggadah hints at the spiritual and national characteristics of the Jewish people. He argues that the beaked visages in the manuscript are not birds' heads at all, but the heads of griffins. The legendary griffin – the body of which resembles both a