A horse gets a refreshing shower after taking part in a race during the derby week in Hamburg, northern Germany, on July 9, 2016. (Photo by Daniel Bockwoldt/AFP Photo/DPA)





Tiger “Dasha” yawns on September 6, 2016 at the zoo in Duisburg, western Germany. (Photo by Bernd Thissen/AFP Photo/DPA)





In this November 30, 2007 file photo, a gorilla looks on at Volcanoes National Park in Ruhengeri, Rwanda. The eastern gorilla has been listed as critically endangered, making four of the six great ape species only one step away from extinction, according to the International Union for the Conservation of Nature's Red List of Endangered Species, released Sunday September 4, 2016. (Photo by Themba Hadebe/AP Photo)





In this August 23, 2016 file photo, a giant panda named Nuan Nuan is shown at the Giant Panda Conservation Center at the National Zoo in Kuala Lumpur, Malaysia. The giant panda has been reclassified as vulnerable from endangered on the International Union for the Conservation of Nature's list of endangered species, which was released Sunday, September 4, 2016 at the World Conservation Congress in Hawaii. (Photo by Joshua Paul/AP Photo)





A migrant bird is seen at the Wazzani river near Khiam, south Lebanon September 4, 2016. (Photo by Jamal Saidi/Reuters)





Migrant birds are seen at the Wazzani river near Khiam village, south Lebanon September 4,2016. (Photo by Jamal Saidi/Reuters)





A migrant bird is seen at Wazzani river near Khiam village, south Lebanon September 4, 2016. (Photo by Jamal Saidi/Reuters)





A migrant bird catches a fish at Wazzani river near Khiam village, south Lebanon September 4, 2016. (Photo by Jamal Saidi/Reuters)





A duck and a migrant bird are seen at Wazzani river near Khiam village, south Lebanon, September 4, 2016. (Photo by Jamal Saidi/Reuters)





A pigeon rests in a decorative tree in a park in Geneva, Switzerland, September 7, 2016. (Photo by Denis Balibouse/Reuters)





A Reticulated giraffe is seen in Samburu National Park, Kenya in this undated handout picture. (Photo by Courtesy Julian Fennessy/Reuters)





An elephant struggles to stand up while having a bath with its mahout ahead of the annual Perahera (street parade) at Rajamha viharaya Buddhist temple in Colombo, Sri Lanka September 9, 2016. (Photo by Dinuka Liyanawatte/Reuters)





A mahout removes chains next to elephants on top of a truck ahead of the annual Perahera (street parade) at Rajamha viharaya Buddhist temple in Colombo, Sri Lanka September 9, 2016. (Photo by Dinuka Liyanawatte/Reuters)





A mahout brushes his elephant as he washes it ahead of the annual Perahera (street parade) at Rajamha viharaya Buddhist temple in Colombo, Sri Lanka September 9, 2016. (Photo by Dinuka Liyanawatte/Reuters)





A mahout brushes his elephant's tail as he washes it ahead of the annual Perahera (street parade) at Rajamha viharaya Buddhist temple in Colombo, Sri Lanka September 9, 2016. (Photo by Dinuka Liyanawatte/Reuters)





An elephant's trunk is seen as it bathes in a pond ahead of the annual Perahera (street parade) at Rajamha viharaya Buddhist temple in Colombo, Sri Lanka September 9, 2016. (Photo by Dinuka Liyanawatte/Reuters)





A mahout brushes his elephant as he washes it ahead of the annual Perahera (street parade) at Rajamha viharaya Buddhist temple in Colombo, Sri Lanka September 9, 2016. (Photo by Dinuka Liyanawatte/Reuters)





Budgies feed on seeds from a local visitor's hands at Ocean Park in metro Manila, Philippines September 10, 2016. (Photo by Romeo Ranoco/Reuters)





Budgies feed on seeds from a local visitor's hands at Ocean Park in metro Manila, Philippines September 10, 2016. (Photo by Romeo Ranoco/Reuters)





A two-week-old female black rhino – the first rhino to be born in a German zoo in 2016 – takes a stroll around her enclosure in Krefeld, Germany on September 8, 2016. (Photo by Rainer Schimpf/Barcroft Images)





A polar bear crouches down on the ice in the Svalbard islands in the Arctic ocean, halfway between Norway and the north pole on September 5, 2016. (Photo by Andy Rouse/Barcroft Images)





A northern potoo sits on a tree stump and skilfully camouflages itself, photographed in the Corozal District of Belize on September 6, 2016. A northern potoo shows it is a master of disguise as it perches on a tree stump and blends into the bark. By plumping out its feathers, the nocturnal bird cleverly imitates the tree during the day, before hunting for flying insects at night. The camouflaged bird was spotted by sharp-eyed photographer Frederic Consejo in a friend's garden in Corozal District, Belize. The 55-year-old, of Consejo, Corozal District, Belize, says: “I was taken by surprise when I realised that a funny shaped tree at my friend's house was actually a northern potoo. I had been hoping to photograph one of these birds for years, but they had always been too difficult to spot”. (Photo by Frederic Consejo/HotSpot Media)





A northern potoo sits on a tree stump and skilfully camouflages itself, photographed in the Corozal District of Belize on September 6, 2016. (Photo by Frederic Consejo/HotSpot Media)





A pug competes during the 5th southern Germany pug and bulldog race in Wernau, southern Germany, on September 4, 2016. (Photo by Christoph Schmidt/AFP Photo/DPA)