Wildlife management

This undated photo shows Buka, a silverback gorilla in a park in the Republic of Congo. Researchers now estimate that there are more than 360,000 lowland gorillas in the wild in Western Africa, approximately one-third higher than earlier figures. However, the gorilla population has plunged by 19 percent in eight years, worrying scientists. (Zanne Labuschagne/Wildlife Conservation Society via AP)

CORRECTS DATE PHOTO TAKEN - In this Feb. 16, 2018, photo provided by conservation group Elephant Family, skin stripped off an elephant carcass lies in southern Ayerawady division, Myanmar. A report by the British-based conservation group says rising Chinese demand for products made from elephant skin is driving poaching and posing a threat to Asia's wild herds even greater than the ivory trade. (Klaus Reisinger/compass films via AP)

In this April 17, 2018 photo provided by the California Department of Fish and Wildlife, wildlife officer Will Castillo replants a Dudleya in Humboldt County, Calif. State wildlife officials say they have uncovered an international plant heist involving thieves from Korea and China who are slipping into Northern California's wild landscapes to pluck succulents they then sell in a thriving black market in Asia. The Mercury News in San Jose, Calif., reports the stolen succulents called Dudleya farinose fetch up to $50 per plant in Asia, where a growing middle class is fueling demand. (Travis Van Zant/California Department of Fish and Wildlife via AP)

This July, 2016, photo provided by World Wildlife Fund, shows dolphins in the Mekong river near Kratie province in the northeastern of Phnom Penh, Cambodia. Cambodia's government and a major conservation group say in a joint statement issued Monday, April 23, 2018, the number of critically endangered Irrawaddy dolphins along a stretch of the Mekong River has increased for the first time in 20 years but the animals still face serious threats. (World Wildlife Fund via AP)

In this undated photo provided by the U.S. Fish and Wildlife Service, an airplane flies over caribou from the Porcupine Caribou Herd on the coastal plain of the Arctic National Wildlife Refuge in northeast Alaska. The Trump administration is moving toward oil and gas drilling in Alaska's Arctic National Wildlife Refuge. A notice being published Friday, April 20, 2018, in the Federal Register starts a 60-day review to sell oil and gas leases in the remote refuge. Oil and gas drilling in the pristine area in northeastern Alaska is a longtime Republican priority that most Democrats fiercely oppose. (U.S. Fish and Wildlife Service via AP)

FILE - This 2013 file photo provided by the U.S. Fish and Wildlife shows nectar-feeding lesser long-nosed bats attracted to a hummingbird feeder during a citizen science bat migration monitoring project in southern Arizona. Wildlife managers in the American Southwest say a once-rare bat important to the pollination of plants used to produce tequila has made a comeback and is being removed from the federal endangered species list. (Richard Spitzer/U.S. Fish and Wildlife via AP, file)

FILE - This Dec. 17, 2017 file photo shows Carolina Panthers' Daryl Worley (26) celebrating his interception against the Green Bay Packers during the first half of an NFL football game in Charlotte, N.C. The Philadelphia Eagles have released Worley hours after he was arrested. NFL Network reported that Worley was arrested Sunday, April 15, 2018 near the team’s practice facility and that police used a Taser on him after he became combative. The Eagles traded wide receiver Torrey Smith to the Carolina Panthers for Worley in March. (AP Photo/Mike McCarn)

In this photo taken Wednesday, March 21, 2018, a team of wildlife veterinarians use a 4x4 vehicle and a rope to turn over a tranquilized elephant in order to attach a GPS tracking collar and remove the tranquilizer dart, in Mikumi National Park, Tanzania. The battle to save Africa's elephants appears to be gaining momentum in Mikumi, where killings are declining and some populations are starting to grow again. (AP Photo/Ben Curtis)