One of two Jaguar cubs born at the San Diego Zoo on April 27 takes its turn on the scale. The 12-day-old cub, which weighs 4.2 pounds, is still too young to get on and off the scale on its own. The two unnamed siblings will remain in the den for a couple of months until they are able to walk outdoors on their own. Keepers have yet to determine the sex of the cubs. The pair are the first Jaguars born at the San Diego Zoo since 1989. Although these two young cubs may look adorable, females can grow to 70 pounds while males can reach 120 pounds. Jaguars are the largest cat in the Western Hemisphere and the third largest of the world's cats. The South American native word for Jaguar, yaguara, means "animal that kills in a single bound. "Unfortunately, demand for the Jaguar's beautiful rosette-covered fur is one of the reasons this species is endangered. In addition, loss of habitat and the human-animal conflict have reduced populations of Jaguars throughout their range from North America through South America.