The Great Barrier Reef is undergoing a major coral bleaching event for the second year in a row. | National Geographic

Louisiana's barrier islands are a rich habitat that host an incredible number of shorebirds during migration and winter. Birds come from all over North America, making it a perfect place to observe the diversity of shorebirds and the different foraging techniques each one uses to capture prey. Check it out and learn more in our Video of the Week: | Cornell Lab of Ornithology