Red-billed leiothrix, songbirds also known as Pekin nightingales, take turns to bathe in a pool of water in Yichang, China on February 5, 2019. (Photo by Liu Shusong/Xinhua News Agency/Barcroft Images)





An eastern curlew catching prey as it wades through incoming tide in Cairns, Australia. The bird is threatened by the dumping of sand on to its mudflat habitat. (Photo by Doug McCutcheon/Alamy Stock Photo)





A juvenile green heron hunting along the edge of Lake Chapala, Mexico’s largest freshwater lake. (Photo by Peter Llewellyn/Alamy Stock Photo)





A flock of avocets wheel over the scrape at Cley Norfolk Wildlife Trust reserve in Norfolk. (Photo by David Tipling Photo Library/Alamy Live News)





A bird perches on a rock surrounded by floating dead fish in the Rodrigo de Freitas lagoon in Rio de Janeiro, Brazil, Friday, December 21, 2018. About 21 tons of fish died in the Rio de Janeiro lagoon, while city authorities and biologists argue about the cause of the die-off. (Photo by Silvia Izquierdo/AP Photo)





A barn owl swoops on its prey in the Cotswolds, England. (Photo by Christopher Cook/Alamy Stock Photo)





A white stork (Ciconia ciconia) eats in the free flight aviary in the bison enclosure a day-old chick thrown to him for food in Lower Saxony, Springe on February 5, 2019. Currently in Germany alone, 45 million male chicks are killed every year in the breeding of laying hens because they do not lay eggs and do not prepare as much meat as broiler chickens. The so-called day-old chicks are also used as animal feed. (Photo by Julian Stratenschulte/dpa)





This Thursday, May 24, 2007 photo released by the U. S. Geological Survey shows a burrowing owl in the Salton Sea, Calif. Researchers have discovered a group of rare owls thriving in a nature preserve near Los Angeles International Airport, LAX. The Los Angeles Times says Sunday, Feb. 17, 2019 that the 10 burrowing owls are the most seen at LAX Dunes Preserve in 40 years. Scientists attribute the return of the migratory owls to ongoing restoration work in the area. (Photo by Douglas Barnum/U.S. Geological Survey via AP Photo)





A seagull rests on a wall overlooking Rome's Via Dei Fori Imperiali Avenue with the Colosseum in background, Friday, December 21, 2018. ({hoto by Andrew Medichini/AP Photo)





A White-tailed sea eagle spending winter in the ice-free bay of Zolotoy Rog (Golden Horn Bay) in Vladivostok, Russia on February 16, 2019. (Photo by Yuri Smityuk/TASS)





Black-throated tits gather around plum blossoms at a plum garden in Wuxi, east China’s Jiangsu province. (Photo by Pan Zhengguang/AFP Photo/Xinhua News Agency/Barcroft Images)





Goldfinches fly over a sunflower field in Ukraine. (Photo by Kostya Pazyuk/Alamy Stock Photo)





A red-billed blue magpie feasts on berries in Xiuhu Park, Zhengzhou, China. (Photo by Costfoto/Barcroft Images)





The “Puffin Census” commenced this week on the Farne islands off the Northumberland coast. (Photo by Paul Kingston/North News & Pictures/National Trust)





Pigeons fly near Yenisei River covered with frost evaporation, with the air temperature at about -26 degrees Celsius, outside the Siberian city of Krasnoyarsk, Russia December 7, 2018. (Photo by Ilya Naymushin/Reuters)





Long-tailed Gentoo Penguins walk in the penguinarium at the Royev Ruchey zoo in Krasnoyarsk, Russia, March 20, 2012. (Photo by Ilya Naymushin/Reuters)





A squirrel and a magpie forage among purple crocuses in Bath, UK, where mild weather has triggered an early bloom of the spring flower. (Photo by Ben Birchall/PA Wire Press Association)





A Secretary bird rolls its eyes back at the World of Birds Wildlife Sanctuary in Cape Town, South Africa, 27 November 2018. The Secretary Bird is a very large bird of prey endemic to Africa. It is usually found in the open grasslands and savannah of the sub-Saharan Africa. Located in the picturesque valley of Hout Bay the World of Birds is the largest bird park in Africa. Over 3,000 birds of 400 different species are uniquely presented in over 100 spacious landscaped aviaries where visitors are able to walk through allowing intimate closeness with the birds. The park is one of Cape Town's premier tourist attractions accommodating over 100,000 visitors annually. Created by Walter Mangold in 1973 the sanctuary cares for all kinds of injured and sick birds and small animals. With a no kill policy every creature is taken care of on a daily basis by the 40 permanent staff members. (Photo by Nic Bothma/EPA/EFE)





An African Weaver bird during day four of the Alfred Dunhill Championships at Leopard Creek Country Golf Club on December 16, 2018 in Malelane, South Africa. (Photo by Stuart Franklin/Getty Images)





A Siberian eagle owl, which can grow up to 71cm tall, is among a collection of 60 birds of prey at SMJ Falconry near Oxenhope, West Yorkshire, England. (Photo by Charlotte Graham)