The Hatinh langur is well-known around the center for their reproductivity rate. And they once again just proved their fame by giving birth to an orange female baby this morning, making it the 7th baby Hatinh langur out of the total 13 baby primates born in EPRC since 2015.
No one would forget the newborn female Hatinh langur’s birthday as she was born on Easter Day, 27th of March. Hatinh langur offspring, just like any other Trachypithecus (Cat Ba langur, Delacour’s langur…), are coated with an orange fur at birth and will gradually transform into their adult fur in the first one year and 3 month of their life. The only difference in coloration between male and female Hatinh langur at birth is the white patch on the rump of the female offspring, while the male wears a orange fur all over their body. Hence, this newborn is a female.
However, a newborn could also have different color variations as some would not be completely orange. This is also the case for the newborn as she’s already possessed a color mixture of black and orange.
It is also a common behaviour for female individuals in a group of langurs to take turn and take care of the infant. This “aunting behaviour” can range from merely approaching the infant to active carrying and protection of the baby. In cage 6A in the EPRC, visitors can observe this behaviour of Hatinh langurs as in addition to the mother, the other females in the cage would occasionally take turn and carry the newborn.
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