Vincent Acovino

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Updated July 2, 2021 at 1:02 PM ET

Ahmir "Questlove" Thompson knows you have probably heard a lot about Woodstock, the legendary summer concert festival of the late 1960s. But a few years back, Questlove, best known as drummer and composer with The Roots, was asked to direct a music documentary, Summer of Soul, about another legendary concert, one you probably haven't heard about.

In the Brazilian Amazon, a species of monkey called the pied tamarin is fighting for survival, threatened by habitat loss and urban development.

But the critically endangered primate faces another foe: the red-handed tamarin, a more resilient monkey that lives in the same region.

They compete for the same resources, and the red-handed tamarin's habitat range is expanding into that of the pied tamarins'. Their clashes sometimes end in violent altercations.

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