but overall length can range from 117 to 135 cm (46 to 53 inches). The adult plumage is of a uniform black, with the exception of a frill of white feathers nearly surrounding the base of the neck and, especially in the male, large patches or bands of white on the wings which do not appear until the completion of the first molting. Mammals There are 456 reported species of mammals in Colombia. Of these, about 22% are endangered or critically endangered. Most of the threatened species status are due to human activities, in particular destruction of plant and animal habitats driven by local consumption of organic resources, especially related to tropical forest destruction. While most of the species that are becoming extinct are not food species, their biomass is converted into human food when their habitat is transformed into pasture and cropland. Colombia has the largest number of terrestrial mammals species in the world, including among others: Colombian woolly monkey Colombian black-handed titi Coppery titi Lucifer titi Black titi Collared titipo Ornate titi White-fronted capuchin Olinguito Giant anteater Giant armadillo Greater long-nosed armadillo Hoffmann's two-toed sloth Jaguar Linnaeus's two-toed sloth Nine-banded armadillo Pale-throated thripee-toed sloth Pygmy marmoset Silky anteater Southern naked-tailed armadillo Southern tamandua Spectacled bear Brown-throated three-toed sloth Amazonian manatee West Indian manatee Hippopotamus. Most of the animals in Pablo Escobar's personal zoo were shipped back to their natural habitats except the hippopotamus; some escaped, and a wild population has established itself in Colombia's main river, the Magdelena. Spread over a growing area, nobody knows exactly how many there are, or what will be their lasting effect on the environment, but estimates of the total population in 2020 range from 40 to 60 individuals. Amphibians Colombia has the largest number of amphibians in the world (including frogs, toads, salamanders and caecilians) with 589 species, 208 of them being endangered, being the zoological group with the highest rate of endangerment. Some causes related with the decline of the amphibians are: chytridiomycosis, habitat destruction, drought, air pollution, water pollution and illegal trade. Reptiles Fish Colombia has high fish diversity, with a 2017 estimate suggesting 1,494 species of freshwater fishes. Following a rapid inventory of the Bajo Caguán-Caquetá region in 2019, there are 513 known species in the Caquetá river and 148 known species in the Caguán. During this inventory eight species were identified as possibly new to science. Molluscs There