Bob,

I took some photos, but they are at quite a distance and not digiscoped, 
so not sure how much use they will be. You should be able to access 5 of 
the photos here:  http://www.flickr.com/photos/35716495@N08/?saved=1    
There are also some DCCOs in the photos as well.

As for the lack of immatures, I have two comments. First, I see some 
reference in the literature to adult males wintering separately from 
other birds. So this could have been an errant group of those. Second, I 
see there is also some reference to immatures with all dark plumage.  
There could have been some of those in the group.

Jim

On 11/16/2011 6:28 AM, Bob Ringler wrote:
> Jim,
>     The state record for Great Cormorant is 27 on Dec. 31, 2000 for the
> Annapolis CBC (multiple observations) and the highest single count is 26 at
> Point Lookout on Jan. 23, 1984. Most reports of Great Cormorants do not
> give the age of the birds but the highest number of adults reported in fall
> is two. Not to have any immatures or sub-adults in a flock that size is
> astounding.
>
> On Sun, Nov 13, 2011 at 5:27 PM, Jim Moore<>  wrote:
>
>> Stopped by Black Walnut Point on the way back from the Rarity Roundup.
>>   Was quite surprised to find 21 Great Cormorants (together with 27
>> Double-crested Cormorants) perched on the pilings out in the bay.  All the
>> birds were adults showing a white throat.  This is an all-time eBird high
>> count for the state (previous high count was 13 in 2003).  Don't know why
>> they showed up all of a sudden.  Maybe the sustained winds of the last
>> couple days dislocated them from a usual roost farther out in the bay.
>>   Good to see in any event.  Felt as though I was back in Massachusetts.
>>   Other birds of interest were Northern Gannets, Long-tailed Ducks, 66 Brown
>> Pelicans, and Surf Scoters.
>>
>> Also stopped by Tanyard Marsh in Caroline county briefly.  There were two
>> Bonaparte's Gulls roosting with Laughing and the other common gulls on the
>> flats.  These are the first of season for Caroline on eBird.  Also saw one
>> of the continuing Black-bellied Plovers, as well as many Wilson's Snipe,
>> Dunlin, three Greater Yellowlegs, hundreds of Killdeer, a few Forster's
>> Terns, and several Green-winged Teal.
>>
>>
>> Good birding!
>> Jim Moore
>> Rockville, Maryland
>>
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