Had one at 3 in the morning. Most fortunately on the right corner of the windshield; so, neither came in, nor messed up my side of the windshield.
Landing light gave me enough warning to duck
Flying in a glider you see lots of birds. There's just as many out there flying behind an engine, but at the higher speed they're harder to see.
If you see one seagull, he's likely got mates nearby.