Typically, Dave Maas' "Killing Time" blog is the happenin' place for awe-striking videos, but today I'll share my own hot find. And it hasn't even gone viral ... yet.

Watch the video below for some unbelievable footage shot in Alberta, Canada, during the winter of 2011-2012 when the mallards were still thick as thieves. Several raptors take advantage of the premigration greenheads with calculated aerial assaults. Warning: There are a few graphic close-ups of the mallards after they've been struck.

According to research presented by Stanford University, "It was long thought that falcons and other raptors struck with their feet clenched like a fist. High-speed cinematographic studies, however, have shown that they strike their prey from above with all four toes fully extended." For some of that high-speed evidence, be sure to watch the 11:35 mark. 

I was hoping to discover a cool name that scientists have designated for the raptors' astonishing hunting technique, but I couldn't find anything. There's probably a term out there somewhere, but in the meantime I'll coin my own version: "the avian rapid razorswipe."