Two black-throated bushtits fly among branches of a flowering tree in Wuxi, east China’s Jiangsu Province. (Photo by Pan Zhengguang/Xinhua News Agency/Barcroft Images)





A frog hopping onto a duck in Franfurt, Germany. (Photo by Gerlinde Beyer/Barcroft Images/Animal Press)





A formerly injured eaglet is released in a suburban New Orleans driveway, near its original nest, in Metairie, La., Tuesday, May 28, 2019. A bald eagle hatched this spring in a New Orleans suburb was released Tuesday in the same neighborhood after two weeks in Louisiana State University's Wildlife Hospital. Dozens of neighbors who have watched over the eagle family cheered as the mottled brown bird hopped out of the cage in which it had traveled from Baton Rouge and launched itself into the air. It sat for several minutes on the roof of a house in the shadow of its nest while a pair of mockingbirds dive-bombed it. Then it flew off. The eaglet had been taken to the LSU veterinary school Wildlife Hospital on May 11. It had been found walking in a nearby street, and barely able to fly. (Photo by Gerald Herbert/AP Photo)





A swallow feeds young birds in Harbin, China. (Photo by Costfoto/Barcroft Media)





A “one-in-a-million” albino house sparrow spotted in a Scottish border town. (Photo by Phil Wilkinson/The Guardian)





A cormorant in Yichun, Heilongjiang, China. (Photo by Costfoto/Barcroft Images)





A pair of migratory scaly-sided mergansers return to Yichun in southern China. (Photo by Costfoto/Barcroft Images)





A Eurasian hoopoe (Upupa epops) feeds her young at a park in Shanghai, China. (Photo by Costfoto/Barcroft Images)





A nightingale shares the water with blue tits at the Nipponzan Myohoji Buddhist temple in Milton Keynes, England. The WWF and iNaturalist are launching Seek, an app designed to encourage get children outside and discovering local biodiversity. The launch comes at a time where more than 1m plant and animal species are at risk of extinction, according to a UN report. (Photo by Tony Margiocchi/Barcroft Media)





A coppersmith barbet perching and looking into the distance in Thailand. (Photo by Phichak/Alamy Stock Photo)





Two Reeves’s pheasants look for food on a mountain slope in Guangshui, central China. (Photo by Mei Yongcun/Xinhua News Agency/Barcroft Images)





Grebes prepare to do the springtime ‘penguin dance’ on a nest partially built from discarded litter, on the south quay at Isle of Dogs, east London. (Photo by Yui Mok/PA Wire Press Association)





A puffin holding a fish in its beak is chased by an Arctic tern on the Farne Islands, off the coast of Northumberland, UK. (Photo by Owen Humphreys/PA Wire Press Association)





A robin perches on a spade handle in a garden on a rainy day in Lixwm, north Wales. Researchers said this week that when European robins are subjected to human-produced noise, their behaviour changes. (Photo by DGDImages/Alamy Live News)





A common buzzard (Buteo buteo) perched on a hedgerow in Wilton, Northamptonshire, UK. (Photo by Keith J. Smith/Alamy Stock Photo)





Three male pekin ducks try to mate with a single female. (Photo by Andi Edwards/Alamy Stock Photo)





A hoopoe, or Upupa epop, carries an insect in Yichun, China. (Photo by Costfoto/Barcroft Images)





A heron near a nest in Pinglu County, north China’s Shanxi Province. As the weather turns warm, hundreds of herons build nests and reproduce here in springtime. (Photo by Liu Wenli/Xinhua News Agency/Barcroft Images)





A lesser prairie chicken, Tympanuchus pallidicinctus, in Kansas. (Photo by James Mundy/Alamy Stock Photo)





A common eider. In Iceland the harvesting of eiderdown has created a peculiar bond between humans and the birds. (Photo by Jack Perks/Alamy Stock Photo)