The term "Amur" primarily refers to the Amur River, which flows through northeastern China and Russia. It is one of the longest rivers in the world, stretching about 2,824 kilometers (1,755 miles). The river serves as a natural border between the two countries and is vital for local ecosystems and economies. Additionally, "Amur" can refer to the Amur leopard, a critically endangered big cat native to the region. This species is known for its beautiful spotted coat and is primarily found in the Russian Far East. Conservation efforts are ongoing to protect its habitat and ensure its survival.