Black throated Diver  Garvia arctica.  Status:   scarce in summer, more frequent in winter and on  passage.

The last confirmed breeding record was in 1972.
 
Black throated diver, Higlands 23rd May 2019. photo by Alan Spellman

Black throated diver at Calgary Bay
                              March 2021
at Calgary Bay 3rd March 2021 Peter Walkden  
Pete Walkden Photography
Black throated diver, Higlands 23rd May 2019. photo by Alan Spellman

 Black throated diver April 2018
                              Calgary Bay


Black throated Diver in Calgary Bay May 2016 photo by Paul Thomas. Visitor from Sheffield 

This pair birds spent summer on a loch on Mull in 2011, but nothing came of it regarding breeding
Black throated diver in winter
winter plumaged bird photo by Michael Booth 2014

Black throated Diver in summer plumage.