This pair of Pine Siskins is devouring the seeds of the invasive common mullein at The Ranch in Montana. I had to laugh at the one on the back of the plant peeking at me with one eye. This plant is a non-native plant introduced by colonists in the 1700s from Mediterranean and Eurasian countries. The Pine Siskins seemed to love it. Nikon D6, Nikkor 500mm PF, Nikon TC 14EIII.