Plus, researchers could hear adult howler monkeys calling back and forth with the infants, who would sometimes try to crawl ...

MORE: 3 climbers dead after falling off mountain while rappelling A baby spider monkey and two rattlesnakes were discovered at the home of a suspect who was busted for methamphetamine during a ...

The footage showed the capuchins walking and pounding their stone tools with baby howlers on their backs. But cameras did not ...

A capuchin named Joker started the apparent trend, leading researchers to suspect "there was something a little quirky about ...

The perplexing baby-snatchings, reported in the journal ... He says their cameras saw several dead howler monkey babies, and the rest surely died, too. BRENDAN BARRETT: They're infants.

In bewildering new footage shared on YouTube a capuchin monkey, the size of a house-cat, is videoed with a baby howler monkey ... observed carrying their own dead offspring, though scientists ...

And orcas have been seen wearing dead salmon on their heads ... Because the baby snatchings have got to be hitting the local howler monkey population hard, as these monkeys don't reproduce ...