Black Scoter and Common Scoter ID

and check out  the eye-ring!

Christian Wegst kindly sent his paper though earlier this spring and its taken me ages to put it up. Given the winter cometh and wildfowl watching will go up- it’s not bad timing, even though I feel I owe Christian an apology. A great resource and could inspire some getting out and looking 🙂

Meanwhile chatting with top N. American birder Ned Brinkley, he has righly emphaised that the coloured eye-ring is VERY different between the two taxa. ID should be simples then!

Read the paper by clicking HERE:

 

Separation of Black Scoter from Common Scoter

 

The Orbital Ring

Hi Martin – I’ve received a manuscript from some California birders on the first North American record of Common Scoter, and they note that the bird’s eye-ring was bright yellowish orange, typical of Common Scoter, whereas Black Scoter tends to have a duller or dusky eye-ring. I don’t have a copy of your Frontiers book as yet. In a search of images of breeding adult males of each online, I’m seeing about 95% of adult male Common with vivid/distinct yellowish eye rings, whereas Blacks appear to have no detectable eye-ring (or in a few cases, a very thin dull yellowish eye-ring). What do you think of this? A Google and Flickr search of images took me just five minutes, but the contrast between these taxa in this respect was surprising.

Ned Brinkley

Hi Ned- I get nil points for speed. Sorry for being so slow. This sounds a great record in California. The text in ‘Frontiers’ in Birding’ refers to americana and says ! ‘Eye-ring tends to be bluish-grey not yellow’  in nutshell yellow eye-ring for Common Scoter – nigra, blue-grey for Black Scoter- americana’. My stuff is about 15-20 years old and may well need sharpening- sounds like your observations are doing just that. So we agree though your precise details are probably more accurate.  

Martin

Common and Black Scoters (1 of 1)

Separation of Black Scoter from Common Scoter

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