Hawk feeding in the garden

I was watching this hawk near the garden a few days ago and wondered what it was chowing down on. It would land in the garden repeatedly and come back out to eat something that didn't look like a mouse. I couldn't imagine what it would be, so later when I was out dumping the kitchen compost I checked the barrel in that last picture. There was a pile of praying mantis legs. Aha!
It looks like most of the mantis egg cases have already been laid. And I guess since the cold will soon get them anyway, they might as well be food for the hawk.