This is an article from 2014, but Vervet Monkeys have been reported on the Island as far back as 2008. Check out the videos on you tube (Monkeys in Sint Maarten or St. Martin). ..Dawn Beach, Oyster pond etc

"Nature Foundation has been conducting baseline surveys to determine the abundance and level of threat posed by the invasive monkey population. Extensive research on controlling the monkey population is also being conducted and government will receive a report from the foundation.

Experts used to dealing with monkeys and other exotic invasive animals will visit various locations in the country to come up with recommendations on the best way to approach the monkey problem.

Residents have contacted Nature Foundation about large groups of Vervet monkeys (Chlorocebus pygerythrus) acting aggressively to residents and pets, overturning garbage bins in numerous districts, destroying gardens and garden furniture and defecating on people’s property. The monkeys have been known to act aggressively if they feel threatened and can also have a negative effect on our local flora and fauna. Monkeys are not picky eaters and will eat anything from bird eggs to ornamental and fruit plants and trees.

Residents are urged by the foundation to not approach these animals."