The brutal heat in Mexico is causing howler monkeys to drop dead from trees
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In southern Mexico, the deep and raspy roars of howler monkeys reverberate through the lush jungles enveloping the city of Comalcalco. The sound — akin to the rumble of distant thunder or the grumble of a large engine — usually crescendos around dawn and dusk, signaling to residents the beginning and end of each day.
