Native to the Brazilian Amazon, pied tamarins have always used vocal calls to communicate. But noise pollution from car traffic and other human activity are forcing some tamarins to complement those voice calls with smell markings to alert others to dangers, researchers report September 20 in Ethology Ecology & Evolution.
Most pied tamarins (Saguinus bicolor) live in Manaus, Brazil, inhabiting fragmented patches of forest scattered around urban environments. According to the International Union for Conservation of Nature, this small, black and whitish-yellow primate is critically endangered.
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