I kid you not, this really did happen to me. Taxiing a 737-200 at Nausori, Fiji, this bloody great hawk type bird kept level with us slowly flapping its wings and sitting (flying) about 50 feet directly in front of the cockpit. I had the radar at full up tilt but on standby.
We turned the radar on for a few seconds to see what would happen as we too had heard about radar and birds.
It had no apparent effect on the hawk, except as we slowed to do a 180 to line up, the hawk momentarily hovered until it was almost on the windscreen then the cheeky bastard dropped a great load of poop on the radome. And then it flapped slowly away.