Not sure what happened here. My first guess is that a hawk got to this pigeon. A trail of feathers laid strewn from a birch tree to where this headless carcass lay, just a few feet from the footpath. I noticed the crows munching away, then I noticed what they were munching on. They are such cagey birds that they took off (with much commenting) when I slowed down to get a better look (and take pictures). I guess an alternative title for this post could be "rubbernecking".