Thursday, 13 December 2018

A Shag in Hull's East Park

This afternoon I thought it was time I checked out our local Goosander winter population.  Before I reached them I was struck by a strange looking Cormorant-like on a post out in the middle of the lake.  On inspection it was mainly dark underneath with a small white patch under the bill.  Juvenile Cormorants have large areas of white on its underparts.  From that distance its bill looked less substantial, and there appeared to be a small bump at the front of its head.  Could this really be a Shag?  They are sometimes found inland after really stormy weather, but it has been quite calm lately.
Immature Shag
 The initial view of the immature Shag
There were at least 15 Goosanders, but the light was fading, so the photos are rather limited. 
Drake Goosander
 Ditto
 Female Goosander
 Size Comparison between Drake Tufted Duck (left) & Goosander
 Ditto
When an immature Cormorant arrived the Shag left its vantage point, and hid on the jetty in front of the boathouse.
Immature Cormorant 
 Immature Cormorant
So, what are the other ID features which show this is a Shag rather than a Cormorant?  The bill of a Shag is a lot more slender and the lower mandible is yellow, while the Cormorant has a uniform dark bill.  The immature Shag has pinkish feet, but Cormorants always have dark feet.  The Cormorant also has a much longer tail.
An Immature Cormorant from the Archives
Immature Shag
 Ditto
 Ditto
 Ditto

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