Tremarctos is a genus of bears known as the short-faced bears, which lived during the Pleistocene epoch. These bears were characterized by their long limbs and short snouts, adapting them for running and scavenging. They primarily inhabited North and South America, with fossils found in various locations, indicating a wide distribution. The most well-known species within this genus is the Tremarctos ornatus, commonly referred to as the Andean bear. This bear is native to the Andes mountains and is the only bear species found in South America today. It plays a crucial role in its ecosystem, helping to maintain the balance of its habitat.