I had the great good fortune today to photograph a Northern Harrier male at rest on a branch. This is almost certainly the same bird that I photographed in flight a couple of days ago, see pics here. I managed a short video, see below.
Here you can see the owl-like face that is said to be characteristic of these birds. The eyes seem to be inset a bit, and the raised brows and lower lids may help the bird shade its eyes from the sun, much as the black eye patches do for the White-tailed Kite.
Note also the formidable claws.
After resting for a few minutes, the bird resumed scanning the ground from low altitudes, sometimes barely clearing the bushes in the park.