Watching birds and trying to photograph them is one thing I spend a lot of time on Marj... very pleasant pastime. Have spent many peaceful hours just watching a single bird, or a whole flock. But I'm definitely not an expert.
A difficult one to call. Hard to see the bird up close. The wings, beak and body seem too bulky for a tern. Could be the trick of light on the wings with grey coming out as dark.
Always great to take photos of birds in flight HW.
Cheer
Glenda
I'm sure I have some photos of the same ones walking around the waters edge, well not exactly the same one but the same type of bird. Will have to go hunting for them