None of today’s New World monkeys has trichromatic color vision–except for the howler monkey. And a major part of the diet of the howler monkey is, interestingly enough, leaves.

Better color vision gives howler monkeys an edge at finding food. Skip to content. ... MONKEY BUSINESS Being able to tell red and green apart helps howler monkeys like this one pick out younger, ...

Most black mantled howler monkeys in Costa Rica have black fur, but in the last few years, researchers studying the monkeys started to notice yellow patches. Usually, the hair contains a type of ...

BRIDGEPORT — Two black and gold howler monkeys — sisters from Texas — now call the Connecticut’s Beardsley Zoo home. Estrella, 6, and Catalina, 4, joined the Bridgeport zoo from San ...

Meet Diego, a 6-year-old male Black Howler Monkey, who recently arrived to Cape May County Zoo from a zoo in Ohio. New Jersey's Cape May County Park and Zoo has a new resident, and he is ready to ...

Cheyenne Mountain Zoo’s latest addition is a real howler, born on the day before Valentine’s Day. Charlie, a 4-year-old black howler monkey, gave birth to her second baby on Thursday at 7:14 a ...

Pesticide use on agricultural plantations may be shifting the color palette of howler monkey fur in Costa Rica, a team of scientists has found. Mantled howler monkeys (Alouatta palliata) are ...

Meet Taavi (tah vee), our baby Howler monkey. His name was picked by his care team from the Mayan language and it translates to “adored one”. We have to say, he is pretty adorable. When ...

WEST PALM BEACH -- Two howler monkeys at the Palm Beach Zoo & Conservation Society added a new addition to their family last week. “Katie” and “Guillermo von Howler” welcomed a healthy ...