The group that has made unsuccessful attempts in the past to convince New York judges to grant habeas corpus to captive chimpanzees is launching a new fight, this time for the freedom of a 47-year-old elephant who lives in the Bronx Zoo.

The Nonhuman Rights Project has filed for a writ of habeas corpus for Happy, an Asian elephant that the group says has been held alone for 12 years at the Bronx Zoo in a 1.15-acre pen.