When I took this picture, these were “almost pecans” in the true sense of the word – just needed to ripen and fall off:
Now they’re almost pecans in another sense of the word: they’re either falling off green and/or being plucked off by the squirrels. I think the first guess is accurate, as they seem to turn black very quickly after they drop. The good news (I guess) is that the squirrels are eating them anyway. I’m thinking that last year’s lack of water was very stressful for the trees and the squirrels.