However, winter and early spring is the best time of year to see numbers of Bald Eagles. If you are interested in seeing large numbers of eagles, an excellent strategy is to visit any large reservoir in late February or early March once there is some open water and migrating waterfowl have arrived. Reservoirs that possess some ice are ideal.

https://outdoornebraska.gov/learn/nebraska-wildlife/nebraska-animals/birds/bald-eagle/