Lead Herpetology Keeper Adam Bland said, “These Chameleons have a really unusual appearance. They’re sometimes referred to as the Cameroon Sailfin, owing to a sail-like flap of skin running along their backs. The males of the species boast two large horns just above their upper jaw which they use for jousting with other males.”
“Even as babies they have their iconic large eyes which, at their current size, may appear a little too big for their body. However these give them 360° arc vision so they can see in two different directions at once and look out for predators,” added Bland.
As the name suggests, the Cameroon Two-horned Mountain Chameleons live at altitude in the West African nation of Cameroon. These lizards are usually green in color, but males turn blue when trying to attract a mate.
Dr Gerardo Garcia, Curator of Lower Vertebrates and Invertebrates at the zoo, added, “These Chameleons are thought to live in just 10 locations in the highlands of Cameroon as they only thrive at a very particular altitude (between 700m and 1,900m), in very specific forest habitat. As much of the highlands of Cameroon comprise of savannah and grasslands, it really restricts their range. Sadly, with that already small amount of available habitat being affected by human activity - degradation, agriculture and climate change - it’s making these Chameleons more and more vulnerable.
“Another big threat to their survival is the international pet trade. Thousands of live Chameleons have been taken from the wild and traded from Cameroon in the last dozen years,” Garcia added. The species is listed as Near Threatened on the IUCN Red List.
Initially, Reitman had wanted to direct but had made only one film, Cannibal Girls , for $5,000.  The film's producers approached Richard Lester and Bob Rafelson before considering John Landis, who got the director job based on his work on Kentucky Fried Movie .  That film's script and continuity supervisor was the girlfriend of Sean Daniel, an assistant to Mount. Daniel saw Landis' movie and recommended him. Landis then met with Mount, Reitman and Simmons and got the job.  Landis remembers, "When I was given the script, it was the funniest thing I had ever read up to that time. But it was really offensive. There was a great deal of projectile vomiting and rape and all these things".  There was also friction between Landis and the writers early on because Landis was a high-school dropout from Hollywood and they were college graduates from the East Coast. Ramis remembers, "He sort of referred immediately to Animal House as 'my movie.' We'd been living with it for two years and we hated that".  According to Landis, he drew inspiration from classic Hollywood comedies featuring the likes of Buster Keaton , Harold Lloyd , and the Marx Brothers .