Ernest Thompson Seton, in Wild Animals I Have Known (1899), tells the true story of Lobo, a large wolf who lived near the Currumpaw cattle ranch in New Mexico. During the 1890s, Lobo and his pack having been deprived of their natural prey by settlers, turned to the settlers' livestock. The ranchers tried to kill Lobo and his pack by poisoning carcasses. But the wolves removed the poisoned pieces and threw them aside. They tried to kill the wolves with traps and by hunting parties but all failed. Ernest Thompson Seton was tempted by the challenge and the $1,000 bounty to try to get Lobo the pack leader. He tried poisoning five baits carefully covering traces of human scent. The following day all the baits was gone. Seton assumed Lobo would be dead. But subsequently he found his five baits all in a pile covered in other "evidence" that Lobo was responsible.
Seton got new special traps and carefully concealed them in Lobo's territory. But he found Lobo's tracks leading from trap to trap exposing each. Finally Seton managed to trap Lobo's mate Blanca with the hidden traps. When Seton found her she was howling for her mate. Lobo answered her call. Seton and his friends lassood her galloped their horses in opposite directions ripping Blanca's body apart. Seton heard the howls of Lobo for days afterward. Lobo's calls were described by Seton as having "an unmistakable note of sorrow in it... It was no longer the loud, defiant howl, but a long, plaintive wail."