An Olive-backed Sunbird feeds its two babies insects in their nest in Klang, Selangor, Malaysia on Saturday, January 21, 2017. Sunbirds, a group of very small passerine birds, feed largely on nectar, although they will also take insects, especially when feeding their young. Sunbirds are found in tropical Africa, India, and the forests of Southeast Asia, including the Philippines. (Photo by Vincent Thian/AP Photo)





In this Friday, January 20, 2017 photo, roosters attack each other during a cockfight as part of Jonbeel festival near Jagiroad, about 75 kilometers (47 miles) east of Gauhati, India. Tribal communities like Tiwa, Karbi, Khasi, and Jaintia from nearby hills come down in large numbers to take part in the festival and exchange goods through an established barter system. (Photo by Anupam Nath/AP Photo)





Flamingo birds are seen lined up for sale at a black market in the Iraqi holy Shiite city of Najaf, on January 24, 2017 Flamingo birds, who find temporary residence in Iraq' s everglades during winter, are becoming victims of illegal trade and hunting. They are sold for around 13 USD on the Iraqi black market. (Photo by Haidar Hamdani/AFP Photo)





A bird flies over new statue in Ohrid, The Former Yugoslav Republic of Macedonia, 26 January 2017. After a couple of extremely cold weeks, daytime temperature has risen above zero degrees Celsius. (Photo by Georgi Licovski/EPA)





A giant red rooster from France named “Mr. Universe” crows as it is shown to the media by Malabon Zoo owner Manny Tangco as part of the “Roosters of the World” exhibition to celebrate the “Red Fire Rooster” in the Chinese lunar calendar Friday, January 27, 2017 in suburban Malabon city, north of Manila, Philippines. The Roosters of the World exhibition features roosters from countries as the United States, Japan, United Kingdom, France, China, Malaysia, Indonesia and Poland. (Photo by Bullit Marquez/AP Photo)





A swan immerses his head over an old bicycle in the Main, in Frankfurt am Main, western Germany, on January 24, 2017. (Photo by Frank Rumpenhorst/AFP Photo/DPA)





Blue Cranes walk in a dry field near the critically low Theewaterskloof Dam in Villiersdorp, South Africa, 25 January 2017. Theewaterskloof Dam is the single biggest dam supplying water to the metropole of Cape Town. The City of Cape Town figures put the dam at 35.2 percent full on 23 January 2017. Cape Town's dam levels are expected to drop below twenty percent in the next few months and experts warn that the city of Cape Town has only 100 days of water left as a drought ravages the area. (Photo by Nic Bothma/EPA)





Red-billed blue magpies fly at the Olympic Forest Park in Beijing, capital of China, January 23, 2017. (Photo by Liu Xianguo/Xinhua/Barcroft Images)





A nutria begs for something to eat at the banks of the Nidda creek in Frankfurt am Main, western Germany, on January 22, 2017. (Photo by Frank Rumpenhorst/AFP Photo/DPA)





A guard dog being trained by a handler at Novosibirsk’s Prison Colony 9, Russia on January 26, 2017. (Photo by Kirill Kukhmar/TASS)





Parrots seen after being rescued from the illegal smugglers at the Natural Resources Conservation Center office on January 21, 2017 in Bandung, Indonesia. The rescued birds will be taken to Animal Rescue Center to be rehabilitated before being released into the wild. (Photo by Jefta Images/Barcroft Images)





An Egret sits near the Aber Wrac'h river on a cold winter day in Landeda, France, January 22, 2017. (Photo by Stephane Mahe/Reuters)





A giraffe stands in the open grassland as red-billed oxpecker birds pick ticks from its head at the Nairobi National Park near Nairobi, Kenya January 23, 2017. (Photo by Thomas Mukoya/Reuters)





A saddle-billed stork stands in the grassland at the Nairobi National Park near Nairobi, Kenya January 23, 2017. (Photo by Thomas Mukoya/Reuters)





A gull flies in front of the Big Ben clock tower and the Houses of Parliament in London, Britain, January 23, 2017. (Photo by Toby Melville/Reuters)





Polar bears, Felix (R), 10, and Aurora, 7, play inside their enclosure at the Royev Ruchey Zoo in Krasnoyarsk, Siberia, Russia January 23, 2017. (Photo by Ilya Naymushin/Reuters)





Felix, a 10-year-old male polar bear, plays inside its enclosure at the Royev Ruchey Zoo in Krasnoyarsk, Siberia, Russia January 23, 2017. (Photo by Ilya Naymushin/Reuters)





Polar bears, Felix (R), 10, and Aurora, 7, play inside their enclosure at the Royev Ruchey Zoo in Krasnoyarsk, Siberia, Russia January 23, 2017. (Photo by Ilya Naymushin/Reuters)





Polar bears, Felix (R), 10, and Aurora, 7, play in the snow inside their enclosure at the Royev Ruchey Zoo in Krasnoyarsk, Siberia, Russia January 23, 2017. (Photo by Ilya Naymushin/Reuters)





A one-month old Bengal tiger cub is seen at the Animal Refuge Fundacion Refugio Salvaje (FURESA) in Jayaque, El Salvador, January 26, 2017. (Photo by Jose Cabezas/Reuters)





One-month old Bengal tiger cubs are seen in their kennels at the Animal Refuge Fundacion Refugio Salvaje (FURESA) in Jayaque, El Salvador, January 26, 2017. (Photo by Jose Cabezas/Reuters)





A one-month old Bengal tiger cub is seen at the Animal Refuge Fundacion Refugio Salvaje (FURESA) in Jayaque, El Salvador, January 26, 2017. (Photo by Jose Cabezas/Reuters)





A Highland cow grazes on frosty heathland in Hothfield, Kent, UK on January 22, 2017. (Photo by Gareth Fuller/PA Wire)