VIDEO: Black Rhino Bulls Fighting for Territory

This video shows two black rhino bulls in a territorial fight.

One rhino is particularly aggressive, inflicting a gaping wound on his opponent… with testosterone pumping, he then charges the game ranger’s vehicle.

Rhinos live in home ranges that sometimes overlap with each other. Feeding grounds, water holes and wallows may be shared. The black rhino is usually solitary. The white rhino tends to be much more gregarious. Rhinos are also rather ill-tempered and have become more so in areas where they have been constantly disturbed.

According to Live Science, rhinoceroses are large, herbivorous mammals identified by their characteristic horned snouts. There are five species and 11 subspecies of rhino; some have two horns, while others have one.

Because the animals’ horns are used in folk medicine for their supposed healing properties, rhinos have been hunted nearly to extinction. Their horns are sometimes sold as trophies or decorations, but more often they are ground up and used in traditional Chinese medicine.

The powder is often added to food or brewed in a tea in the belief that the horns are a powerful aphrodisiac, a hangover cure and treatment for fever, rheumatism, gout and other disorders.

Save the Rhino estimates that there were 500,000 rhinos across Africa and Asia at the beginning of the 20th century.

Today, the group says, there are 29,000 rhinos in the wild. Poaching and loss of habitat have put all rhino species in danger of extinction.

In 2009, four northern white rhinos were moved from a zoo in the Czech Republic to a private conservancy in Kenya in the hope that they would breed, according to the IUCN.

On Oct. 18, 2014, Ol Pejeta Conservancy announced that one of them, one of the last two breeding males, had died. He was not a victim of poaching, however, and the conservancy was investigating the cause of death.

There are now only three northern white rhinos left in the world, all living in captivity, according to the World Wildlife Fund. The captive northern white rhinos include a male (named Sudan) and two females — Najin and Fatu — all of which live in the Ol Pejeta Conservancy in Kenya.

The two females are incapable of a successful pregnancy: Najin is too old and issues with her legs make it impossible for her to support the weight of a mounting male; Fatu has a uterine condition that will likely keep her from breeding, according to experts.

With natural breeding attempts nixed for the northern white rhinos, conservationists have turned to in vitro fertilization. However, IVF in these rhinoceroses comes with its own set of challenges, including figuring out how to get immature eggs to develop outside of the female’s body and also how to inject sperm into these eggs.

As for the Sumatran rhinos, they are hanging on by a thread as well. Along with the Javan rhino, Sumatran rhinos are barely hanging on in the wild. They went extinct in Vietnam in 2010 and in Malaysia in 2015, according to the International Rhino Foundation. Small populations of the subspecies survive in three national parks in Sumatra.