The bald eagle previously photographed on its nest in May has successfully raised two nestlings, both of which may fledge in the near future. The young eagles are all brown — it will be four years before they attain the white head and tail of an adult. As they near their two-month-old date, the young eagles are flapping their wings and lifting themselves up several inches in the air and onto nearby branches as they develop their flight muscles and practice landing. Research indicates that up to half of all eagle nest departures are unsuccessful, and the young may remain on the ground for weeks before regaining flight ability. While the parents do continue to feed them, the fledglings are very vulnerable to predators.