I'm sure you've seen these many times on the Northeastern Colorado grasslands.
http://www.whatbird.com/forums/photos/nieblas_gallery/category1562/picture52218.aspx
Ahhhhh, Chris, those are the cutest little owls! They're fun to watch, too.
Yes, I've seen them frequently here on the beautiful Colorado plains, but now recently.
As usual, wonderful picture!