Beginning from Endangered Species Day 2018 on Friday, 18 May, images of species at risk from the National Geographic Photo Ark will be featured for a week on billboards in 22 countries and on every continent – except Antarctica.

Featuring photography from the National Geographic Photo Ark, the week long campaign will run in 22 countries around the world and will aim to raise awareness of species at risk.

The National Geographic Photo Ark, led by photographer Joel Sartore, is a multiyear aim to document every species living in zoos and wildlife sanctuaries, encourage action through education, and help save wildlife by supporting on-the-ground conservation efforts.

To date, Sartore has documented 8 000 species, putting him two-thirds of the way toward completing the Photo Ark, which he says will include portraits of more than an estimated amount of 12 000 species.

Primedia Outdoor is supporting the global out-of-home campaign by contributing space on five digital out-of-home displays in South Africa, seen by 1 878 916 people each week.

In total, the week-long effort will aim to reach an estimated 100 million globally through donated ad space on digital billboards, mall kiosks, tram cars, rail stations and other digital out-of-home formats.

The campaign will feature 10 species, all of which are listed on the International Union for Conservation of Nature Red List as vulnerable, endangered or critically endangered.

Global audiences will also be invited to visit www.photoark.org to learn more about the species depicted across the digital out-of-home formats.

For more information, visit www.primediaoutdoor.co.za. You can also follow Primedia Outdoor on Facebook or on Twitter.