More IDs for Sal Cape Verde (2 Viewers)

[Martin16]

Along the Berwickshire coast we are familiar with Common. Arctic, Sandwich, Roseate, Black and Little Terns, but not so familiar with them in their winter habitat! The attached photos where taken in Palmeira, Sal, Cape Verde on 24th December. Initial analysis suggest they are Sandwich Terns, but I would welcome comments on ID of those shown on the attached photos.
The photos are of the same terns.

 

[cheshirebirder]

Along the Berwickshire coast we are familiar with Common. Arctic, Sandwich, Roseate, Black and Little Terns, but not so familiar with them in their winter habitat! The attached photos where taken in Palmeira, Sal, Cape Verde on 24th December. Initial analysis suggest they are Sandwich Terns, but I would welcome comments on ID of those shown on the attached photos.
The photos are of the same terns.

Would agree with sandwich terns .

 

[Martin16]

Thank you for your feedback.

 

[THE_FERN]

How to rule out common for at least some of these: for example tern 1. Suggest head pattern and bill might be better for that

 

[Butty]

I don't see anything particularly Sandwich-terny about any of them.