A hippopotamus is sprayed with water on a hot summer day at Anna National Zoological Park in Chennai, India on April 26, 2017. (Photo by Arun Sankar/AFP Photo)

This combination of pictures created on April 30, 2017 competitors posing before a beard and moustache competition at the Ecomusee d'Alsace in Ungersheim on April 30, 2017. (Photo by Sebastien Bozon/AFP Photo)

Participants arrive at the finish line during the annual Maldon Mud Race in Maldon, east England on May 7, 2017. Originating in 1973, the race involves competitors racing around a course through the River Blackwater in Essex at low tide. (Photo by Daniel Leal-Olivas/AFP Photo)

Actress and model Charlotte McKinney attends the grand opening of NightSwim at Encore Beach Club at Wynn Las Vegas on May 5, 2017 in Las Vegas, Nevada. (Photo by David Becker/Getty Images for Wynn Las Vegas)

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)

Lily Donaldson attends the “Loveless (Nelyubov)” screening during the 70th annual Cannes Film Festival at Palais des Festivals on May 18, 2017 in Cannes, France. (Photo by Tristan Fewings/Getty Images)

Vian Salman, center, smiles with fellow contestants after she was crowned the new Miss Iraq during the Miss Iraq contest in Baghdad, Iraq, Thursday, May 25, 2017. (Photo by Karim Kadim/AP Photo)

Over the years a large population of grey herons have made an unlikely home in urban Amsterdam. Julie Hrudova documents how the birds integrate into city life. Here: Hundreds of herons come to the city during winter to find food and shelter. (Photo by by Julie Hrudova/The Guardian)