This video from the USA says about itself:
Take an up-close look at the remarkable physical adaptations White-winged Crossbills use to retrieve seeds hidden inside tightly closed spruce cones.
From the Cornell Lab or Ornithology in the USA:
Red Crossbills are among the most enigmatic and nomadic of all finches. The good news is that Matt Young and Tim Spahr have put together a piece that helps demystify the 10 ‘types’ of Red Crossbills in North America. Check it out!