Nashville Zoo's troublemsome trio of Clouded Leopard Kittens is just over a month old. The three are beginning to fully open their eyes and are much more active than they were just four weeks ago. Clouded Leopards are vulnerable to extinction due to habitat loss. Nashville Zoo participates in the Thailand Clouded Leopard Consortium, which leads a multi-faceted conservation program that includes a viable self-sustaining breeding program.

Video and photo credits: Christian Sperka

See more pictures of the cubs after the jump