howler monkeys at San Lorenzo
mikdbow (Premium member) > albums > Panama, Coast to Coast to Coast
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Howler monkeys have a short snout, and wide-set, round nostrils. They range in size from 56 to 92 cm, excluding their tail which can be equally as long. Like many New World monkeys, they have prehensile tails. Unlike other New World monkeys, both male and female howler monkeys have trichromatic color vision.[2] This has evolved independently from other New World monkeys due to gene duplication.[3] They have a lifespan of 15 to 20 years. Howler species are dimorphic and can also be dichromatic (i.e. Alouatta caraya). Males are, on average, 1.5 to 2 kg heavier than females.
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