This is Mali and Jaya, two Sumatran Tigers i was doing behavioral research on.
Mali is a 9 month old female cub and Jaya is her mother.

Mali's such a little brat :D


Update: Sad news, Mali passed away on July 22, 2011 due to post-surgical complications after having surgery to relieve her distended stomach. Necropsy showed no blockage in her intestinal tract, but it was later found via tissue samples that a bacteria that is common in low levels in tigers had reached dangerous levels and was releasing a toxin causing her stomach to distend and her GI tract to no longer function.