Did any more crows show up? Usually they mob birds of prey - a hawk appeared in our garden one day, and huddled against the bottom of our hedge. Then we heard the crows, a big flock of them, in hot pursuit. Fortunately they flew past our place.
For egg-eating scavengers, crows run a tight ship - no predators allowed near them.
But one crow taking on an eagle by itself, that's an impressive crow. Long may he flap.
I watched a hummer today feeding on one of my giant firs. It has to be eating sap? I don't think there is any nectar in fir pine cones. It would explain what the hummers that don't migrate eat through the winter.
Or maybe it was eating insects? They feed bugs to their hatchlings.