Iraqi paramilitary troops fire towards Islamic State militants during a battle with Islamic State militants on the outskirts of the ancient city of Hatra near Mosul,Iraq April 26, 2017. (Photo by Reuters/Stringer)

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 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)

Tsunami, an eleven year old female Sumatran Orangutan eats a fruit platter during her birthday celebration at the National Zoo Ape Center in Kuala Lumpur, Malaysia, Thursday, December 31, 2015. (Photo by Manan Vatsyayana/AFP Photo)

A three-year-old girl smokes a cigar during the Saint Simon celebrations in San Andres Itzapa, Guatemala, on October 28, 2019. Thousands believe that the saint helps people find work, solves family problems and cures illnesses. (Photo by Orlando Estrada/AFP Photo)

Palestinian groom Mohamed abu Daga and his bride Israa wear face masks amid the COVID-19 epidemic, during a photoshoot at a studio before their wedding ceremony in Khan Yunis in the southern Gaza Strip, on March 23, 2020. Authorities in Gaza confirmed on March 22 the first two cases of novel coronavirus, identifying them as Palestinians who had travelled to Pakistan and were being held in quarantine since their return, as the United Nations warned of potential disastrous outcomes to an outbreak given the high poverty rates and weak health system in the coastal strip, under Israeli blockade since 2007. (Photo by Said Khatib/AFP Photo)

Camila Hormazabal, a 24-year-old sеx worker, meets with a virtual customer in Concepcion, Chile on April 7, 2020. Hormazabal now offers sеxual services online after the nightclub where she had worked was closed due to the outbreak. With no way to pay her bills, Hormazabal switched to video calls conducted from her high-rise apartment bedroom, and asked her regulars to meet her online. She is one of the thousands of sеx workers worldwide left in a precarious position after the very intimacy that defines their work was thwarted by social distancing measures. (Photo by Juan Gonzalez/Reuters)

A caiman in the Pantanal region of Brazil in 2021. They are used to seeing humans, allowing the photographer, Leighton Lum, a close-up shot. (Photo by Leighton Lum/Caters News Agency)