The only nest that has a open clearing to the west is the Deadman Island eagles. This gives them a added bonus. Thats why I leave these guys to the last when I’m out visiting all the other eagles.
By that time, the sun is perfect and the will last the longest . All the other nests go into shadow by this time. Vargas Island is the only thing blocking the sun to the west. I’ll bet there are nests on the western side of some of these islands. The light would be just as good as Deadman,but last longer,because there is nothing to obstruct the sun light.