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Monday, June 17, 2013

Black and White Ruffed Lemur

Black and White Ruffed Lemur
The black-and-white ruffed lemur is the more endangered of the two species of ruffed lemurs, both of which are endemic to the island of Madagascar.
The black and white lemur is always both black and white, their general color patterns do not usually vary. The black-and-white ruffed lemur (V. v. variegata) abdomen, tail, hands and feet, inner limbs, forehead, face and crown are black.
Pelage is white on the sides, back, hind limbs and on the hindquarters. Males and females look the same.

Black-and-white ruffed lemurs are known to form a natural hybrid zone with the Red-Ruffed Lemur. This zone may have once been very large before humans came into contact with the two subspecies. The calls of the two organisms differ in frequency and pulse rate.
Studies of groups of black-and-white ruffed lemurs both in captivity and in the wild have demonstrated a variety of social structures from pairs to large groups. Parenting in this species of lemurs is unique in that no single infant is invested in but instead, females bare litters of multiple offspring. Males also play a role in the parenting of the offspring especially in smaller groups where the certainty of paternity is high. In larger groups, the chance of a female mating with more than one male increases as does uncertainty in paternity. This tends to decrease the level of male care of offspring. Instead of clinging to the mother, offspring are placed into a nest which is guarded by both parents.
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