Crossbills are aptly named for the interesting biology of their beak. The tips of the beaks are (yup you guessed it) crossed. This makes it all the better to crack cones with (ok sorry slight off topic diversion to the world of Little Red Riding Hood).
These birds are stocky finch-like birds that will be found in coniferous forests. They have nomadic habits and heavily rely upon the cone crops for survival. These birds will breed at any time of the year as long as the cone crop is sufficient for survival of their young. Spend time scanning the tops of the evergreen trees--especially spruce and fir to find your own crossbill sighting this fall!
To hear vocalization of the Red Crossbills go HERE. White winged Crossbills can be seen and heard HERE.