Global wildlife populations will decline by 67% by 2020 unless urgent action is taken to reduce human impact on species and ecosystems, warns the biennial Living Planet Index report from WWF (World Wide Fund for Nature) and ZSL (Zoological Society of London). From elephants to eels, here are some of the wildlife populations most affected by human activity. Here: The maned wolf is among the large mammals in the Brazilian Cerrado that are threatened by the increasing conversion of grasslands into farmland for grazing and growing crops. (Photo by Ben Cranke/Nature Picture Library/Alamy Stock Photo)

A hot air balloon competition called “Grudziadzkie Zawody Balonowe” is held in Lisie Katy, central-northern Poland, 14 May 2021. The compe​tition is held for the eighteenth time. (Photo by Tytus Zmijewski/EPA/EFE)

English television personality Georgia Harrison is seen attending House of CB Christmas Party at Old Sessions House on November 29, 2023 in London, England. (Photo by Ricky Vigil M/Justin E Palmer/GC Images)

Kumari Samita Bajracharya sits in front of devotees offers during a special puja at Kumari Ghar in Patan, Nepal, 09 April 2011. It is believed that worshipping Kumari and receiving tika from her reduces illness and avoid problems. Kumari, or Kumari Devi, is a “living goddess”. The word literally means virgin in Nepali. The Living Goddesses are young pre-pubescent girls that are considered to be incarnations of the Hindu Goddess of Power, Kali. The Kumari retires when she reaches puberty. (Photo by Narendra Shrestha/EPA)

Winner Petra Vlhova from Slovakia celebrates on the podium of the FIS women's World Cup slalom in Zagreb, the “Snow Queen Trophy 2022”, on January 4, 2022. (Photo by Antonio Bronic/Reuters)

Mailin Gobbo reacts as she leaves the courtroom after hearing a judge acquit former Catholic Priest Carlos Eduardo Jose, who she says sexually abused her for years when she was an adolescent, in San Martin, Argentina, Tuesday, March 9, 2021. The court acquitted the 62-year-old, citing the statute of limitations had run out. (Photo by Natacha Pisarenko/AP Photo)

In this May 21, 2021, file photo, JoJo Hamner, a cast member of the “Sexxy After Dark: Where Dinner Meets Play” show, gets the Pfizer COVID-19 vaccine during a pop-up vaccine clinic at Larry Flynt's Hustler Club in Las Vegas. It's one of several methods health officials are employing here and across the country to bring vaccines directly to people to counter waning demand. In tiny towns, ballparks, strip clubs, and marijuana dispensaries, officials are setting up shop and offering incentives to entice people who so far have not gotten shots. (Photo by Ellen Schmidt/Las Vegas Review-Journal via AP Photo/File)

Stadium security stop a pitch invader during the UEFA EURO 2020 Group B football match between Finland and Belgium at Saint Petersburg Stadium in Saint Petersburg, Russia, on June 21, 2021. (Photo by Kirill Kudryavtsev/Pool via AFP Photo)