Regnum: Animalia
Phylum: Chordata
Class: Mammalia
Ordo: Primates
Familiar: Cercopithecidae
Genus: Trachypithecus
Species: Trachypithecus poliocephalus ssp.
Belonging to the Trachypithecus genus, the Cat Ba Langur is characterized by its distinctive grayish-black fur, complemented by striking white sideburns and a crown of silver-gray hair atop its head. Their long limbs and prehensile tails enable agile movements through the limestone karst formations, where they call home.

The Cat Ba Langur finds solace in the limestone forests of Cat Ba Island, part of the Ha Long Bay archipelago. This unique habitat, characterized by towering limestone cliffs and dense vegetation, creates an ecological niche for the langurs. Unfortunately, their distribution is highly restricted, making them vulnerable to habitat loss and fragmentation.
These langurs exhibit a complex social structure, living in cohesive groups led by a dominant male. They are known for their acrobatic feats as they traverse the karst landscapes, leaping between limestone outcrops. Vocalizations and grooming play a crucial role in communication, fostering social bonds within the group.
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