As the whitetail rut is slowing down, the rut for bald eagles (and other raptors) is now beginning. Several times in recent days I have seen adult bald eagles together in trees.
Bald eagles lay eggs and incubate during some of the coldest months of the year. My understanding is that the timing of nesting is so there will be plenty of prey (young of the year of other animal species) to feed the hungry young eagles. Often the adults are buried under snow while keeping their eggs warm.
At this time adult bald eagles may be seen building or improving their nests. In a couple/few months we should be able to watch them on nest cameras as they incubate and tend to their young.
Adult Bald Eagles in Tree at Sunset: