How to Identify?
Identifiable by the dark grey back and red point on the yellow beak. Larger than the more common Ring-billed gull which as a light grey back and black ring around the beak.
We combine physical characterics and behavior patterns with location and seasonal aspects to identify species.
Where & When to Spot?
I see this bird all year around except winter. Usually sitting on a rock surrounded by water. I haven't seen this species within flocks of other gulls.
With each photo, we store date and geo-location providing us data about location and season of observation. We also use a tracking utility to save observations in the field when there was no opportunity to take a good shot.