Palila v. Hawaii Department of Land and Natural Resources was an ecological court case pertaining to the Palila and the Māmane-Naio ecosystem of Mauna Kea. The case stems from the introduction of goats and sheep onto Hawaii island in the late 18th century, which became feral and damaged the local ecosystem. Before the 1920s elimination program was completed, it was replaced with a game control plan that caused controversy between hunters and conservationists. Claiming that the state of Hawaii was violating the Endangered Species Act, a suit was filed to the Ninth District Court; as a result, the state was ordered to eradicate all feral animals on the island within two years. A public hunting program was put in place, and has been largely effective; the Palila has begun to recover, and the case demonstrated federal power to protect endangered species. Roots The roots of the case go as far back as the late 18th century, when goats (Capra hircus) and sheep (Ovis aries) were released on the island and became feral. They were highly damaging to the endemic ecosystem (especially Palila (Loxioides bailleui), which became critically endangered), and competed with commercial livestock for resources. A government program for their elimination was put in place in the late 1920s. The numbers were reduced from an estimated 40,000 to 200 in 1950. However, they were not fully eradicated; an increase in leisure time and greater ease of access to the mountains drove an influx of hunters who saw the remaining feral species as game animals. The Hawaii Department of Land and Natural Resources conceded, and in place of the eradication program a sustained-control program was introduced. This was followed by introducing feral mouflon (Ovis aries orientalis) onto the island for hunters. In addition to mouflon, axis deer (Axis axis) were proposed for introduction. This was met with protests against their introduction by farmers and ranchers, who saw them as a threat to food resources and a vehicle for bovine disease. The hunting industry fought back, and the back-and-forth between the ranching industry and hunters eventually gave way to a rise in public environmental concern; reports were published that showed that there was no environmentally sustainable way the deer could be introduced onto the island, and the issue was finally laid to rest. With conservationists demanding protection of Mauna Kea's ecosystem, plans were made to fence off 25% of the forests from