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Larus michahellis lusitanius

Posted: Fri Nov 20, 2009 9:44 pm
by marsmuusse
I've just read the post about the Madrid bird again, and crossed this site: ... a-esp.html

Anyone in this forum with contacts to the people photographing these ringed birds?
And, could it be arranged to add a section to, especially dedicated to these ringed birds with 800px photographs and more text explaining migration of this taxon, ID, moult process, phenotypic characteristics, etc?


Re: Larus michahellis lusitanius

Posted: Wed Dec 08, 2010 11:55 pm
by marsmuusse
Gabi, Antonio and Mars are trying to create pages on this taxon. If you have any images, particularly of ringed birds, please feel free to send them to me. Its a very interesting taxon to enlarge upon by month-by month coverage of plumages.
A first idea:

Thanks, gabi, Antonio, Mars

Re: Larus michahellis lusitanius

Posted: Wed Jul 06, 2011 9:46 am
by marsmuusse
For about 100 2cy June birds, which mostly should be lusitanius on location (but some Med micha sneaked in without doubt).
Many thanks to Chris for all images.

Re: Larus michahellis lusitanius

Posted: Mon Jul 11, 2011 10:53 am
by Chris Gibbins
Hi. Great job Mars - I'm glad these images have found a useful home.


Re: Larus michahellis lusitanius

Posted: Thu Jul 28, 2011 2:20 pm
by Cristian Mihai
Great job, Mars. Beautiful pictures Chris (as usual, I would say :D ).

Re: Larus michahellis lusitanius

Posted: Mon Dec 17, 2012 9:05 pm
by marsmuusse
We have been working lately on the pages of atlantis and lusitanius. Its an interesting group, obviously different in some plumages, still very closely related genetically. We decided to maintain the lusitanius group as separate from atlantis from the Azores (despite its close genetic relationship), and we include birds from the "southern Atlantic group" in atlantis.
So we have atlantis: Azores, Madeira, Canaries, Moroccan coast,
and we have lusitanius: Iberian Atlantic coast.
We'll see if this has to be maintained this way, we may work with caption to separate between pictures, etc.

Actually, just a post to tell we are adding "notes from the past" onto these pages, starting with:


- Comparative study of four populations of Yellow-legged Gulls in Western Europe. by Anne TEYSSEDRE IN: L'Oiseau et R.F.O., V. 53, 1983, n° 1.

If you know interesting additions, please let us know.
Enjoy reading!
Gabriel Martín
Antonio Gutierrez
Rui Caratão
Mars Muusse

Re: Larus michahellis lusitanius

Posted: Wed Jan 02, 2013 10:13 am
by alfosse
marsmuusse wrote:...
Anyone in this forum with contacts to the people photographing these ringed birds?...
Three 1st-cy cr-'lusitanius' reached recently Western France, some pictures you may use on
red 6F5:G &
orange 5·BLF &
orange 0BL·C &

lusitanius outer rectrice

Posted: Wed Jan 02, 2013 12:01 pm
by lou bertalan

looking through some examples of lusitanius, i found noted in two places that lusitanius has a double black marked outer web of r6, as opposite to nominate michahellis: ... ept04.html
i can't really follow this feature since it is normal in all michahellis to show this, like e.g. in this classic example (nominate mich): ... 67959.html

there' always a bit of the actual broad tail band in it, then a variable moonlike white insert and then again variable, a triunghiular black mark, sometimes elongated. prioncipally, i found this to be present in all michahellis taxons! true is that atlantis on average shows a broader tail band than nominate mich which is obvious even in the most canarian birds. such birds can have more marks on outer web of r6 than micha but this isn't as obvious as the wideness of subterminal band itself? an it was mentioned for lusitanius - which doesn't necessarily show a wide band. on the other hand there will be hardly any nominate mich with such a tail pattern: ... ept06.html