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 Mosaic (Jerusalem) The mosaic includes many figures of birds, which are inscribed in 39 round medallions formed from images of grape vines. The mosaic is bounded by a colorful "braided" frame. This is a symmetric mosaic, where elements on the right side are "reflected" to the left, so every bird on the right side has a twin on the left side, except those on the central axis. Therefore, most of the birds are facing the central axis. The birds lack "depth " and perspective: while Greek and Roman mosaic art involved perspective and three-dimensional depiction, Byzantine mosaic art which developed in Israel