I want to harvest our sunflower seeds. A few for snacks and a few for next year and maybe even a second harvest if I can get them in the ground soon. Last time I failed miserably and harvested too soon. I'm trying to avoid that this year, but I don't want the wildlife to get them either. Here is what they look like now, obviously some are in different stages and a few just blooming. None look quite ready to me. But what say the experts? How long from here until harvest? They seem to close up after losing petals and a few appear to have been bitten off already.