This was a weird one - looked to be an immature RT Hawk heading north above Phinney Ridge in Seattle in thermal spiral - looked to have something royal blue attached to the leading edge of I believe both wings. Pretty prominent, maybe about 2"x6", but could have been bigger - I was seeing from underside. About the color of the bags the NY Times sometimes comes in. I was wondering if it was trash that somehow got attached to the bird, or a deliberate identifier? Seemed awfully prominent for that. Bird was acting if nothing unusual was going on.

??

Brad Liljequist
Phinney Ridge
Seattle