Alan Dalton post's birding diaries and original artwork from Sweden. Established in 2006, this now long running blog is now a complete overview of my birding experiences. As an artist I greatly enjoy sketching birds in the field and you will find a wide selection of that work here, from fieldwork to finished paintings. I am very passionate about my artwork and try to depict birds in their natural habitat, as I see them in the wild. My artwork is for sale and can be viewed at http://www.alandalton.net/
As regards to my photography, since 2008 I have used a Nikon D90 DSLR camera coupled with a Sigma 150-500mm OS lens for since March 2012 for bird photography, all previous images being digiscoped. Regarding sound recording, I have been usung a Telinga Stereo Dat Mic and parabol to record birds in the field, coupled to a Marrantz 661 digital recorder, a superb piece of kit. Interest in butterflies, dragonflies and damselflies has recently seen the accquisition of a Sigma 150mm macro lens. I hope you enjoy the blog and please feel free to leave comments or contact me at alandltn@gmail.com

Tuesday, September 08, 2009

Argentatus 1st Calender; Skeppsbron; 8th September 2009

Argentatus 1st Calender in flight. This view of the upperparts gives an excellent view of the inner primary window, which is caused by pale inner webs on the primaries and is one of the major features which help to distinguish 1st year Herring Gulls in the field. Note also the tail pattern, the inner tail perhaps a little whiter than normal for Herring Gull. Variation in these birds is enormous...

The same bird in all of the pictures on this post, a better view of the tail and rump here...

... a view from above shows the bulk and width of the bill, also note the underwing here, suffuse barring visible on the axillaries, underwing coverts and primary coverts, to a lesser extent the secondaries.

Another good photo showing the inner primaries well...

Note the shorter bill than Caspian is also a little deeper with a more pronouced gonedeal angle. Also note the amount of white in the wing coverts, the tertial pattern and the slightly shorter primary projection...

The bill looking remarkably long and fine, indeed rather Caspian like! A look at the tertials, which are broadly fringed and rather notched eliminates Caspian. A good view of the wing coverts here too....

In flight again, the inner primaries have the effect of isolating the secondaries, which show as a dark bar...

A view of the underside in flight, the underwing appearing dark, as it often does. Note brownish head, breast and flanks.




The second bird, all these photos are of the same bird, rather more interesting this one. The bill drew my attention, a little long and fine, rather dark too. This is a Herring Gull nevertheless, which can be seen by studying the plumage, particularily the tertial pattern, which is typically notched. Also in flight the paler window on the inner primaries is noticable, this is due to paler grey inner webs on the primaries.





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