Featured Article Summary #203

The tiger (Panthera tigris) is a large wild cat native to Asia, known for its muscular body, long tail, and orange fur with mostly vertical black stripes. Tigers are sometimes grouped into nine subspecies, but others classify them more simply as mainland and island tigers. They mainly live in forest habitats across Asia and are apex predators that hunt mostly hooved mammals using ambush. Tigers are usually solitary, with males overlapping the ranges of multiple females, and cubs typically stay with their mother for about two years before becoming independent. Since the early 1900s, tiger populations have shrunk dramatically, with major losses across much of their historical range, and they are now listed as Endangered due to habitat loss, poaching, and illegal trade, as well as conflicts with people. Tigers are also widely known in culture and mythology, and they have been kept and trained in captivity for entertainment for a long time. The word “tiger” came into English from Old French “tigre,” which traces back to Latin “tigris.” Some older theories linked it to an Armenian or Persian word meaning “arrow,” and even suggested a connection to the river Tigris, but this link is now doubtful and the similarity is likely just coincidental. In 1758, Carl Linnaeus officially described the tiger in Systema Naturae and named it Felis tigris, because the genus Felis was commonly used for many cats at the time. Later, in 1929, Reginald Innes Pocock reclassified the tiger into the genus Panthera, giving it the name Panthera tigris. Between the early 1800s and early 2000s, nine tiger subspecies were suggested, including Bengal, Malayan, Indochinese, South China, Siberian, Caspian, Javan, Bali and Sumatran tigers. Some scientists questioned these subspecies because they were mostly based on museum specimens’ fur and size, which may not reflect wild populations, leading to a proposal in 1999 and reaffirmation in 2015/2017 to recognise only two subspecies (mainland Asia and the Greater Sunda Islands). Later genetic studies gave mixed results: whole-genome work found separate evolutionary branches for several subspecies (supported in later years), while a 2023 study supported all nine—so the IUCN is currently reviewing tiger subspecies taxonomy due to differing interpretations of the evidence. The tiger is closely related to other big cats in the genus Panthera, and genetic evidence suggests it is closely linked to the snow leopard, with their lineages splitting millions of years ago. Fossils show that early Panthera relatives existed in northern China, but some proposed species may actually be the same as an earlier one, and the first clear modern tiger remains are jaw fragments from the early Pleistocene. Later tiger fossils are found across Asia, including China, Sumatra, Java, and parts of the Philippines, while reports from Japan were likely misidentified cave lions. Genetic studies indicate all living tigers descended from a common ancestor around 108,000–72,000 years ago, with populations shrinking during glaciation and then spreading from a refuge in Indochina after the Last Glacial Maximum.