The head and body of the mandrill reach about 38 inches, the tail 30 inches.
When a mandrill bares its teeth, it is not threatening to attack, but rather showing a submissive behavior.
And Gabon offers less, in that most of the country is thick, green jungle, and you might only catch a glimpse of a mandrill or a gorilla heading in the wrong direction.
We currently have no estimate for the number of mandrills left in the wild.
Viarruel said calls had been made by his colleagues to the Ministry of Public Utilities and Environment to repair the boxes where the chimpanzees and mandrills slept.
Now the research at Lope is showing that, behaviourally, mandrills are a class unto themselves.
One of the most fascinating questions is why male mandrills sport such bright colors.
Her work with the large African monkeys known as mandrills shows that red coloration gives males an advantage when it comes to mating.
Other new arrivals to the park this winter will include mandrills and bamboo lemurs.