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Message: <blockquote data-quote="Gavin Haig" data-source="post: 1156483" data-attributes="member: 15000">There was a very helpful article in a 'Devon Birds' magazine not too long ago. I cannot lay my hands on it right this minute, but suspect it is the piece entitled 'Continents Apart' by Mike Langman, in vol 58 (1) pp.14-20 (2005). There is also a very handy comparative photo in the 2003 Devon Bird Report, showing a carbo and sinensis side by side - if memory serves, the angle formed by the rear edge of the gular patch needs to be comfortably in excess of 90 degrees before you can consider sinensis, and the photo clearly demonstrates that. On that basis alone your photo shows a carbo, Joe.  There are other differences (slighter build, more slender bill, etc), but without the geometry any description is a non-starter...Hope that helps.EDIT - Correction! I've just found the article (which is excellent, and is in the 'Devon Birds' cited above), and the 'safe' gular patch angle is actually 80+ degrees, not 90+. Well worth acquiring this reference if you genuinely want to try to ID sinensis Cormorants, as long as you don't mind adding a protractor to your birding kit! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /></blockquote>