Crows Harass Hawk in SE Burnaby, BC

I heard some crows making a racket and figured they were harassing a raptor.

Sure enough, I eventually made out this hawk (Red-tailed?) in a tree.

After awhile the crows flushed the hawk, and it flew to a light standard above the Skytrain maintenance yard, where the crows continued to dog it.

hawk crows taylor park burnaby bc