Male monkeys have large throats and specialized, shell-like vocal chambers that help to ... A gripping tail is particularly helpful to howler monkeys because they rarely descend to the ground.

Primates possess special anatomical structures in their throats called vocal membranes, allowing for yodeling at higher ...

What do you like best about ... of green dominated by top predators like jaguars and harpy eagles. In the middle of the food chain were animals like howler monkeys which ruled the treetops ...

Lisa Corewyn, associate professor in the Department of Biology and coordinator of the anthropology minor at Ithaca College, ...