Black Howler Monkey - female with infant.
Black howler monkeys are one of the few primate species with different coat colors in males and females—a trait called sexual dimorphism, which is a broad term that includes differences in size, behavior, and other characteristics between males and females of the same species. Males have a black coat, while females are blonde. Black howler monkeys have a prehensile tail without hair on the bottom side, which they use for grasping during locomotion. The upper molars have sharp, shearing crests that are used in grinding leaves. They move slowly using a quadrupedal mode of locomotion and they have five-toed, grasping feet. The large hyoid bone (Adam's apple) that allows for their loud call restricts arm movement, so howler monkeys rely heavily on their tail for locomotion.
Black Howler Monkey - female with infant.
Black howler monkeys are one of the few primate species with different coat colors in males and females—a trait called sexual dimorphism, which is a broad term that includes differences in size, behavior, and other characteristics between males and females of the same species. Males have a black coat, while females are blonde. Black howler monkeys have a prehensile tail without hair on the bottom side, which they use for grasping during locomotion. The upper molars have sharp, shearing crests that are used in grinding leaves. They move slowly using a quadrupedal mode of locomotion and they have five-toed, grasping feet. The large hyoid bone (Adam's apple) that allows for their loud call restricts arm movement, so howler monkeys rely heavily on their tail for locomotion.