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
Killing Birds Soavi, who had direted "Stage Fright" for him in 1987, to direct "Killing Birds" next. However, Soavi chose to direct "The Church" instead when "Lamberto Bava" decided not to do it as part of his "Demons" series. Soavi's assistant director on "Stage Fright", Claudio Lattanzi, was used as director for "Killing Birds". There are differing testimonies as to how D'Amato and Lattanzi shared in directing the film: The film was released theatrically in Italy through "DMV distribuzione" in 1988 under the English title "Killing Birds" and later on home video: on VHS by "Magnum 3B" under the title "Killing Birds: