A Brussels Airlines aircraft prepares for landing in Cointrin airport during sunrise over the Mont Blanc in Geneva December 1, 2011. (Photo by Denis Balibouse/Reuters)

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)

These Eurasian Otters seem ready for any danger as they all stand up on thier hind legs alert to any threats near to the English river bank. Amateur photographer and retired MOD worker Tony Moir, 57, spotted the otters whilst looking for kingfishers to photograph near the river Trent in East Yorkshire, UK. He was able to take just a couple of pictures before the excited animals spotted the photographer and ran away. (Photo by Tony Moir/Solent News)

LCR Honda IDEMITSU's Japanese rider Takaaki Nakagami crashes in the second MotoGP free practice session of the Portuguese Grand Prix at the Algarve International Circuit in Portimao, on April 16, 2021. (Photo by Patricia de Melo Moreira/AFP Photo)

A pitch invader is seen on the pitch during the UEFA Euro 2020 Championship Group B match between Finland and Belgium at Saint Petersburg Stadium on June 21, 2021 in Saint Petersburg, Russia. (Photo by Kirill Kudryavtsev/Reuters)

A man carries a civet while taking part in an animal welfare campaign ahead of the World Animal Day celebrations on October 4, in Banda Aceh on October 2, 2022. (Photo by Chaideer Mahyuddin/AFP Photo)

Phoenix Mercury guard Sophie Cunningham takes a selfie with teammate Brittney Griner, during the WNBA basketball teams' media day, in Phoenix, Wednesday, May 3, 2023. (Photo by Matt York/AP Photo)

Cai Xuning, 36, takes care of pet rabbits at PET ZONE pet store on January 17, 2023 in Wuhan, Hubei Province, China. Pet rabbit breeder and PET ZONE store owner Cai Xuning is seeing an increase in interest in pet rabbits, as China prepares to welcome the Spring Festival on January 22, ushering in the Year of the Rabbit. (Photo by Getty Images)