Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Problem:The Philadelphia Zoo is mourning the death of a longtime beloved lion. 
  
 The zoo euthanized Zenda, a 25-year-old female African lion, on Thursday, the zoo announced Friday. Zenda’s mobility had declined as had her behavior. 
  
 "At 25, Zenda was the oldest African lion in the United States zoo population by several years, and significantly exceeded the 17-year typical life expectancy for lions in zoos," said a news release from the zoo. 
  
 After being born at the Johannesburg Zoo in South Africa, Zenda lived at the Philadelphia zoo from the summer of 1993 until 2004 when her pride was relocated to the Columbus Zoo before returning to Philadelphia for the opening of Big Cat Falls in 2006. 
  
 "This remarkable cat will be missed by staff and guests alike, particularly by the keepers who catered to her changing needs as she grew old," said Philadelphia Zoo CEO Dr. Andy Baker. 
  
 Zenda became a fixture in the large cat habitat at the zoo. 
  
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 "Despite their already advancing age, Zenda and her pridemates were eager explorers of the habitat time-share system allowed by the design of Big Cat Falls when we opened it in 2006," said Baker. "Their engagement was one of the inspirations for our pioneering Zoo-wide trail system concept. Zoo360 – a new way for animals to experience a zoo – is part of Zenda’s legacy." 
  
 Six other African lions continue to live in the zoo’s Big Cat Falls – the oldest is just 7 years old. 
  
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 The Philadelphia Zoo says its 25-year-old big cat named Zenda recently experienced a severe decline in mobility and behavior. She was euthanized Thursday. 
  
  
  
 Zoo officials say Zenda was a popular and much-loved animal. In announcing her death Friday, the zoo noted that lions in zoos typically live about 17 years. 
  
  
  
 Zenda was born at the Johannesburg Zoo in South Africa in 1991. She arrived in Philadelphia two years later, along with three other lions. 
  
  
  
 The pride relocated temporarily to the Columbus Zoo in 2004, returning to Philadelphia for the opening of the Big Cat Falls exhibit in 2006. 
  
  
  
 The Philadelphia Zoo has six other African lions. |||||
Solution:
America's elder stateslion has died. CBS News reports Zenda, a 25-year-old African lion at the Philadelphia Zoo, was euthanized Thursday. The zoo says Zenda was the oldest African lion in an American zoo "by several years," according to NBC Philadelphia. The Philadelphia Inquirer reports Zenda was in impressive health considering her advanced age until recently, when her condition rapidly declined. Lions in zoos typically live about 17 years. As the oldest African lion in America, Zenda was the beneficiary of a number of perks, including her own personal heater and air conditioner. On the Monday before her death, she received her favorite meal: 10 pounds of raw steak wrapped around a bone. Zenda was born in 1991 at South Africa's Johannesburg Zoo. She came to the Philadelphia Zoo with three other lions in 1993. Her keeper, Kay Buffamonte, says Kenda was a peacekeeper among the other lions, calming everyone down when there were fights over toys or space. “She was the one that held everyone together,” Buffamonte says. And after two decades at the Philadelphia Zoo, she had a relationship with many of its workers. "This remarkable cat will be missed by staff and guests alike, particularly by the keepers who catered to her changing needs as she grew old," NBC quotes the zoo's CEO as saying. There are six African lions remaining at the Philadelphia Zoo; the oldest is just 7 years old.