An “Abondance” breed cow eats hay during the 55 th International Agriculture Fair (Salon de l' Agriculture) at the Porte de Versailles exhibition center on February 28, 2018 in Paris. The Paris International Agriculture Fair is held from February 24 to March 4, 2018. (Photo by Gerard Julien/AFP Photo)





Two alpacas are pictured at the zoo in Frankfurt am Main, western Germany, on February 23, 2018. (Photo by Fabian Sommer/AFP Photo/DPA)





A white-eye gathers honey on a cherry tree at Wushan scenic spot in Fuzhou, capital of southeast China's Fujian Province, February 27, 2018. (Photo by Mei Yongcun/Xinhua/Barcroft Images)





Black Grouse birds seen indulging in the courtship and mating rituals at dawn on February 23, 2018 in Hamra National Park, Sweden. German wildlife photographer Ingo Gerlach has captured the courtship and mating rituals of the Black Grouse, a large sedentary game bird found across Northern Eurasia. The striking feature of this bird is the bright red wattle over the eye of the larger all black males, while the females are smaller and brown-grey in colour. Also known as blackcock or black game, these birds are famous for the elaborate and distinctive courtship rituals performed by the males. Ingo captured this very phenomenon in the Hamra National Park in central Sweden. (Photo by Ingo Gerlach/Barcroft Media)





Victor the polar bear enjoys the snow at the Yorkshire Wildlife Park in Doncaster, South Yorkshire on February 28, 2018, as heavy snow and sub-zero conditions have blighted Britain's roads, railways and airports, with delays and cancellations. (Photo by Danny Lawson/PA Images via Getty Images)





A gull and a cormorant challenge for a fish in the harbor of the German Baltic Sea town of Stralsund, Wednesday, February 28, 2018. An extreme Siberian cold snap sweeping across Europe is claiming lives in Poland and Romania, but also dusted the ancient ruins of Pompeii with snow Tuesday and prompted Amsterdam authorities to prepare the city's iconic canals for ice-skaters. (Photo by Stefan Sauer/DPA via AP Photo)





Iceland horses play in their paddock in Obernhain near Frankfurt, Germany, Thursday, on a cold and sunny March 1, 2018. (Photo by Michael Probst/AP Photo)





A sparrowhawk (Accipiter nisus) hunts near Pomaz, 23 kms north of Budapest, Hungary, 27 February 2018. (Photo by Attila Kovacs/EPA/EFE)





A duck looks at icicles at a pond in Bern, Switzerland February 26, 2018. (Photo by Stefan Wermuth/Reuters)





Deer clash antlers as snow falls in Richmond Park in London, Britain, February 28, 2018. (Photo by Toby Melville/Reuters)





A blue tit (Cyanistes caeruleus) is spotted near Pomaz, 23 kms north of Budapest, Hungary, 27 February 2018. (Photo by Attila Kovacs/EPA/EFE)





Great tits (Parus major) are spotted near Pomaz, 23 kms north of Budapest, Hungary, 27 February 2018. (Photo by Attila Kovacs/EPA/EFE)





A blue tit flies among dried plants covered with hoarfrost near the Belarus village of Dukora, some 40 km (25 miles) southeast of Minsk, Monday, February 26, 2018. The temperatures in Belarus reached –19 Celsius (–2,2 degrees Fahrenheit). (Photo by Sergei Grits/AP Photo)





A picture taken on February 24, 2018 shows a sea turtle swimming in the water off the shore of the Lebanese town of Naqoura, south of the capital Beirut, Lebanon. (Photo by Joseph Eid/AFP Photo)





A squirrel eats grains from a bird feeder in Lazienki park on a cold sunny day in Warsaw, Poland, Wednesday, February 28, 2018. An extreme Siberian cold snap sweeping across Europe is claiming lives in Poland and Romania, but also dusted the ancient ruins of Pompeii with snow Tuesday and prompted Amsterdam authorities to prepare the city's iconic canals for ice-skaters. (Photo by Alik Keplicz/AP Photo)





This undated handout photograph released by Stony Brook University/ Louisiana State University on March 2, 2018, shows an Adélie penguin (R) looking at a drone at breeding colony on Heroina Island, Danger Islands, Antarctica. A thriving “hotspot” of some 1.5 million Adelie penguins has been discovered on the remote Danger Islands in the east Antarctic, surprised scientists announced on March 2, 2018. (Photo by Rachael Herman/AFP Photo/Louisiana State University AND Stony Brook University)