birds, mating season, egret, animal behavior, biology, wildlife

FILE - In this April 19, 2015 file photo, two great egrets mate in their nest in the mangroves on an island in Cat Bay, in Plaquemines Parish, La. Ten years after the nation's biggest offshore oil spill fouled its waters, the Gulf of Mexico sparkles in the sunlight and its fish are safe to eat. But scientists who have spent $500 million dollars from BP researching the impact of the Deepwater Horizon disaster have found much to be concerned about. (AP Photo/Gerald Herbert, File)