Performers Roni, Liv and Becky behind the scenes at Great Yarmouth Hippodrome Circus, England. (Photo by Nick Warner/The Guardian)

The National Geographic Photo Ark is a travelling exhibition of photographer Joel Sartore’s quest to create a photo archive of biodiversity around the world. So far, Sartore has captured studio portraits of more than 6,000 species – a number that he hopes to double. On 1 July, the ark will open at Melbourne zoo – the first time it has been exhibited in the southern hemisphere. More than 50 portraits will be on display, including many of Australian endangered animals being protected by programs at the zoo itself. These captions have been edited from text supplied by Melbourne zoo. Here: Barking owl. (Photo by Joel Sartore/National Geographic Photo Ark/The Guardian)

A monkey tries to quenche its thirst from a water tap on a hot summer day in Prayagraj on May 20, 2023. (Photo by Sanjay Kanojia/AFP Photo)

Wild Thang, a Pekingese competing in the 2023 World’s Ugliest Dog Contest sits in the waiting kennel before the start of the annual World's Ugliest Dog contest at the Sonoma-Marin Fair in Petaluma, California, on June 23, 2023. Scooter was the winner of the 2023 World’s Ugliest Dog Competition. (Photo by Philip Pacheco/AFP Photo)

Seattle Mariners center fielder Julio Rodríguez laughs as teammate Teoscar Hernández douses him as they celebrate a 9-2 win over the Baltimore Orioles in a baseball game Friday, August 11, 2023, in Seattle. (Photo by Lindsey Wasson/AP Photo)

People cross a flooded street during a rainstorm as Tropical Storm Hilary arrives Palm Springs, California on August 20, 2023. Southern California is under a tropical storm warning which could bring heavy rains, high winds and flooding. (Photo by Philip Cheung for The Washington Post)

Flames burn in a field in Capaci, near Palermo, in Sicily, southern Italy, Wednesday, July 26, 2023. On the island of Sicily, two people were found dead Tuesday in a home burned by a wildfire that temporarily shut down Palermo's international airport, according to Italian news reports. Regional officials said 55 fires were active on Sicily, amid temperatures in the 40s Celsius. (Photo by Alberto Lo Bianco/LaPresse via AP Photo)

Visitors to West Midlands Safari Park in Bewdley, UK on October 17, 2023 are enjoying the bright October sunshine ahead of the storms to come. A curious giraffe meets eye to eye with a car full of happy visitors while licking the car windscreen with his long tongue. (Photo by Lee Hudson/Alamy Live News)