This giant panda seems content to be indulging in his favorite snack at the Wolong National Nature Reserve in the mountains of Sichuan, China. Bamboo makes up 99 percent of a panda’s diet, and it must consume upwards of 30 pounds of the woody grass each day to meet its dietary needs. This presents a predicament, as human development continues to encroach on the bamboo forests of pandas’ natural habitat. National Panda Day, celebrated on March 16, aims to spread awareness about this iconic species.