I noticed a ponderosa pine near Crystal Lake (Shasta County CA) whose top cracked off in our January wind storms. I told Leonard that snag would make a great osprey or eagle nest. I was right! About two weeks ago I discovered a pair of osprey (Pandion haliaetus) beginning to build a nest on the tree. I often wondered why these platform nests so high in the air never slide off the tree in heavy wind. Watching these osprey build their nest gave me the answer. As can be seen in the one picture, the bottom of the nest is anchored around the top of the snag. Most recently I watched one of the pair bring what looks like moss or other soft lining material to the nest. Maybe they will soon be brooding eggs. This is a good year for osprey. I know of at least six active nests.