Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
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 Email notifications are only sent once a day, and only if there are new matching items. ||||| Story highlights 19 dead elk found near Jackson, Wyoming, state wildlife official says 
  
 A pack of nine wolves slaughtered the herd in night, official says 
  
 (CNN) A pack of wolves slaughtered a herd of elk in one night, Wyoming wildlife officials said Friday. 
  
 Nineteen elk, mostly calves, were found dead several days ago at a feeding ground near Bondurant, a town southeast of Jackson, said John Lund of the Wyoming Game and Fish Department. A contractor delivering feed to the herd discovered the dead animals. 
  
 Lund said wildlife officials are concerned because wolves usually eat what they kill or come back later to feed. 
  
 The pack suspected of killing the elks has nine wolves, he added. 
  
 There are about 1,100 elk in the area, he said, and about 7% of the population has been lost to wolves this winter. ||||| Stock image of a gray wolf. (Photo: mlharing, Getty Images/iStockphoto) 
  
 Nineteen elk were killed by wolves earlier this week in what’s being called a “surplus kill,” according to Wyoming wildlife officials. 
  
 Wolves killed seventeen elk calves and two adult cows near Bondurant, Wyo., according to John Lund the Pinedale regional wildlife supervisor for the Wyoming Game and Fish Department. 
  
 It’s not unusual for wolves to kill one or two elk a night, but to have 19 killed in one night “is fairly rare,” he said. 
  
 Lund said a surplus killing is when an animal kills more of its prey than it can eat and then abandons the surplus. 
  
 "We’re not sure what triggers surplus killing, because in many cases predators will kill with the intent to eat, but in this case something triggered and they went crazy and just took down each elk and moved on to the next,” he said. 
  
 He said over the past winter, wolves in the area have killed at least 70-75 elk, which is a "significant" number. 
  
 "Based on what we’ve seen in this elk herd, likely [the deaths] will impact our hunting season and hunter opportunity," he said. 
  
 Because the wolves are federally protected, Wyoming wildlife managers can not take measures on a local level to curb their populations, even if they are killing high numbers of elk, he said. 
  
 He notes that the federal government typically refrains from managing the wolf populations unless they are killing livestock. 
  
 Wyoming wolves kill 19 elk in suspected "surplus killing" - https://t.co/i6JImt66BWpic.twitter.com/YDVi6ZCl9z — KTVQ - Q2 News (@KTVQ) March 25, 2016 
  
 For the most part, wolves do not “kill for sport,” Mike Jimenez, the Northern Rocky Mountain Wolf Coordinator for the U.S. Fish and Wildlife Service told County 10. 
  
 "We did an eight-year study, and we looked at elk feed grounds. What we found is that generally wolves did not kill what they did not eat,” he told the outlet. 
  
 Follow @MaryBowerman on Twitter. 
  
 Read or Share this story: http://usat.ly/1MpE10E |||||
A:
Wolves killed 19 elk—17 of them calves—in one night in what Wyoming officials are calling a "sport killing," USA Today reports. "They went crazy and just took down each elk and moved on to the next," the game and fish department's John Lund says. Killing that many elk in one night is unusual for area wolves, who typically stick to one or two kills per night. According to the Casper Star-Tribune, the carcasses of the elk herd were found at a feeding ground Tuesday. Lund tells CNN officials are concerned because wolves usually eat their kills or at least come back to feed later. The carcasses have been left out incase the wolves do eventually come back, but that's unlikely as humans have now touched the carcasses. Ken Mills, a biologist with the game and fish department, tells the Star-Tribune sport killings can be triggered by an increased vulnerability in prey, due to anything from snow to disease. “They’re like a person living day to day, getting enough to survive. When prey is vulnerable, they don’t have that mechanism to stop,” Mills says. “Killing is how they survive. If someone is barely making it day to day and they walk into a buffet, they’re going to eat like it’s a buffet.” Lund estimates about 7% of the area's 1,100 elk have been killed this winter—well above normal. That will likely have an impact on hunting season, but the state's hands are tied. Wolves, which are federally protected, can be legally killed if they're attacking livestock but not wild game.