Howler monkeys are relatively small primates known for their incredibly loud, low-frequency roars that sound as if they come from a much larger creature. This is useful in the animal kingdom because ...
Predation theory -- Predation and primate cognitive evolution / Klaus Zuberbühler -- Predation on primates : a biogeographical analysis / D. Hart -- Anti-predator strategies of nocturnal primates -- ...
For Costa Rica's howler monkeys, one of the greatest threats is not a predator or a poacher. It is the network of power lines stretching across their shrinking habitat. A landmark ruling by Costa Rica ...
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