The jaguar is the third-largest feline after the tiger and the lion, and the largest in the Americas. The jaguar's present range extends from Southwestern United States and Mexico across much of Central America and south to Paraguay and northern Argentina.he jaguar (/ËdÊaeÉ¡juËÉr, ËdÊÃ¦É¡juËÉr, ËdÊaeÉ¡jÊÉr/ ËdÊÃ¦É¡jÊÉr /ËdÊaeÉ¡juËÉr/), ËdÊÃ¦É¡juËÉr or, ËdÊaeÉ¡wÉr ËdÊÃ¦É¡wÉr panthera onca, is a big cat A feline, in the panthera genus and Is the only extant panthera Species. native to the americas