This raven was hopping and flapping on some narrow pipes inches away from a building on Mare Island. Apparently the bird had some trouble flying, hence the hopping and flapping, but eventually made it to the roof which had been the goal. In a couple of the photos, one of the wings appears to have feather damage which, perhaps, could account for the difficulty flying the few feet between the pipes and the roof.
I love watching animals think! –Sally Mack, May 13, 2018