In the early 1980s ethologist Robert Horwich conducted a study of black howler monkeys
in Belize, Mexico, and Guatemala.
The primates in question are not baboons at all, but some 1,200 black howler monkeys
(so named for their distinctive call, which can travel two miles) whose habitat has been protected through the tireless efforts of primatologist Dr.
The tour's birdwatchers pointed out the flock of toucans cavorting in the trees, and the guide alerted us to bands of howler monkeys
, orderly processions of leafcutter ants and tiny red poison dart frogs, whose muscle-relaxing venom is reportedly 1,500 times more powerful than cocaine.
Observe howler monkeys
and sloths while visiting Quepos and Manuel Antonio National Park.
Around 87,000 species -- an estimated 6 percent of all known species -- live there, including howler monkeys
, pumas and toucans.
Toni said: "There were jaguars prowling in the gardens, boa constrictor snakes and howler monkeys
Our first stop was Esmeralda Lodge - three wooden cabins tucked away in the jungle, where you fall asleep to the sound of frogs and wake to the bellow of howler monkeys
before birdsong signals breakfast.
Only Brazil's Pantanal region - where the wildlife includes giant otters, howler monkeys
, giant anteaters, capybara, caiman, tapir, toucans and hyacinth macaws - was said to be better for nature encounters in October.
Residents can pick mangos, watch howler monkeys
and parrots, and enjoy stunning views of the landscape and ocean right from their very own homes.
The howler monkeys
in particular enjoy sitting and leaping on to the new wooden platforms built by DZG Upper Primates Keepers.
The sporadic emergence of YFV in the Americas has been strongly associated with infection of red howler monkeys
(Alouatta seniculus), which are particularly susceptible to disease.
The other characters from the animal kingdom that Ribbit encounters in his search for his princess include ocelot cubs, howler monkeys
, a alligator and a pair of manatees.