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)

Two Chinese farmers got more than they bargained for when they pulled up the root of a fleece flower – and came face-to-face with the doppelganger of Homer Simpson, on May 17, 2013. The large root appears to have two bulging eyes and a prominent nose – giving it an uncanny resemblance to the famous cartoon character. With two offshoot roots shaped like arms, it even looks like it is pondering or confused – just what you would expect from the real Homer. (Photo by ImagineChina)

REUTLINGEN, GERMANY - NOVEMBER 17: Students hang out finished parchment leather at the LGR (Lederinstitut Gerberschule Reutlingen) tannery school on November 17, 2010 in Reutlingen, Germany. Even in early antiquity and up their hair or dried goat and sheep skins were used as material for documents. In the small Asian city Pergamon these skins were processed in large quantities for this purpose, so they formed the main trading arm of the city, of which the name is parchment is derived. In medieval times, reached the parchment is of great importance, it was such as France's production under the supervision of the University of Paris. Even now, important documents, placed on their unlimited shelf life as possible large value (eg diplomas, addresses, memory, writings, documents for primary and keystones) written on parchment...

A combination picture shows Will Adam, 14, snowboarding down a street on Beacon Hill during a large winter blizzard in Boston, Massachusetts, United States January 27, 2015 (top), and a woman looking at her phone as she walks down the same street June 13, 2015. Outdoor scenes in Boston show local residents enjoying balmy weather amid lush greenery as the summer solstice approaches on 21 June. The very same locations suffered heavy snowstorms last winter, with snow ploughs, skiers and snowboarders battling the drifts. Boston got 275.8 cm of snow over the winter, the most since 1872, when records began. A few months after the snowstorms, Brian Snyder revisited the same places and shot pictures at exactly the same locations. (Photo by Brian Snyder/Reuters)

A boy looks inside the skull of a Tyrannosaurus Rex replica at the Egidio Feruglio Museum in Trelew, Argentina, in this May 18, 2014 file photograph. Scientists on July 28, 2015 unveiled a comprehensive analysis of the teeth of the group of carnivorous dinosaurs called theropods, which include the Tyrannosaurus Rex, detailing a unique serrated structure that let them chomp efficiently through the flesh and bones of large prey. (Photo by Maxi Jonas/Reuters)

A retrospective spanning Enzo Mari's 60-year career. at the Science Museum in London on March 27, 2024. This large-scale exhibition includes the full spectrum of Mari's output, from his work as a designer, but also as an artist, teacher, critic and theorist. In total, more than 300 objects will be on display – most have not been seen in the UK before. (Photo by Guy Bell/Alamy Live News)

Football fans watch a broadcast of the UEFA Euro 2020 round of 16 match between The Netherlands and Czech Republic on a terrace in Amsterdam, the Netherlands, 27 June 2021. Visitors had to be tested in advance and once did not have to keep a distance of 1.5 meters. As one of the relaxation of the corona measures, catering establishments are allowed to place large screens to show the matches. (Photo by Ramon van Flymen/EPA/EFE)

In this Tuesday January 21, 2014, file photo, slaughtered chickens are displayed for sale at a wholesale poultry market in Shanghai. The Chinese government on Tuesday, June 1, 2021, says a 41-year-old man has contracted what might be the w0orld’s first human case of the H10N3 strain of bird flu, but the risk of large-scale spread is low. (Photo by AP Photo/File)