WI - Cormorant Research Group Colour-ringing updated on 08-10-2010

Colour-ringed cormorants
Great cormorant (P. carbo) and Shag (P. aristotelis)
list of solved mysteries

Based on replies sent to the cr-coordinator or the webmaster,
or posted to the colour-ring birding group

Country of sighthings
Belgium - Denmark - France - Germany - Italy - Spain - Poland - The Netherlands  - UK

Belgium

 

Left tarsus Right tarsus Locality and date Observer Note Reporto to
         

Denmark

Left tarsus Right tarsus Locality and date Observer Note Reporto to
metal ring Årslev Engsø, Jylland
08 April 2008 and 3 more times since then		 M. J. Hansen The right code was SABT and refers to a cormorant ringed as adult while wintering in Spain
(see the ringing project section)		 Mystery solved in late April 2008

France

Left tarsus Right tarsus Locality and date Observer Note Posted on / Solved by

France - 4 October 2010

 
Fabrice RAYER

observation reported by Alian Fosse'

5 October 2010 / 7 October 2010
cormorant N7K (not XLN) was ringed on 14.06.2008 in Øra Naturreservat, Fredrikstad, Østfold, Norway (source: Åge Sten Fredriksen)

 

Alsace / France

 E. Schmitt Bird born and ringed in UK  

Germany

Left tarsus Right tarsus Locality and date Observer Note / Photo Reporto to 
Germany, Bavaria, 
Dürrlohspeicher in Mühlhausen
 (NM)
several days in September 2010
 
Robert Selch
 mystery posted on
05 / 10 / 2010

mystery solved
06/10/2010

the true colour was BLUE


+
 Saaraltarm Besseringen, Germany
several obs. in Oct. & Nov. 2003		 Emil Pinter, Rolf Klein & Martin Buchheit Adult bird
Left: below metal ring, above small GREEN ring without inscription
Right: K1L (white) on GREEN ring

posted on 26 Nov. 2003		 Mystery solved on 1 Dec. 2003

Bird ringed in Denmark

Italy

Colour ring
Style, colour and code		 Leg Date
yyyy / mm / dd 		Observer
Ringing scheme		 Note
? 1996 03 31 Italy Mystery solved on 30/11/00:
bird ringed in Poland on 12 June 1993
? 1995 11 28 " Mystery solved on 30/11/00:
bird ringed in Poland on 9 May 1995
? 2000 02 27 " Mystery solved on 30/11/00:
bird ringed in Poland 22 June 1997
? 1998 01 24 " Mystery solved on 30/11/00:
bird ringed in Poland 22 June 1997
? 1997 03 00 " Mystery solved on 30/11/00:
bird ringed in Poland 27 May 2000

Right

19960228, 19961019,
19961025, 19961031,
19961112, etc.

"

 Mystery solved on 15/06/2003:
the right color ring was GREEN
bird ringed in Denmark, June 1996
? 1999 11 01 " Mystery solved on 24/11/00:
bird ringed in Netherlands
? 1996 03 13 " Mystery solved on 24/11/00:
ringed in Netherlands
? 1991 11 20 " probably ringed in Netherlands if a bar was not recorded (S / J)

Poland

Left tarsus Right tarsus Locality and date Observer Note Posted on
Solved by

or
 Hel harbour (Pomorskie)
22 Sept. 2000		 Szymon Bzoma age unknown mystery solved by T. Bregnballe on July 2002:

GREEN 01C was ringed on 6 June 1999 in the colony at Mågeøerne, near Bogense, NW
Funen, Denmark, 55.35N-10.07E.

Spain

Left leg
ring style, colour and code		 Right leg
ring style, colour and code		 Locality and date Observer Note
Gijón, Spain,
22/10 and 25/11/2000		 Juan Julio Fernández-García mystery solved: the bird was a Shag not a Great Cormorant

El Abra port, Getxo, Vizcaya, Spain
26/01/2000

Javier Elorriaga

mystery solved - the exact ring code was H | X

 

The Netherlands

Left tarsus Right tarsus Locality and date Observer Note Posted on / Solved by

Oostvaardersplassen
Flevoland, The Netherlands
09.04.2002		 Mervyn Roos ring-colour
"light brown"		 mystery solved by Jacob Sterupt on 11/4/2002

the true original ring-colour was RED (not brown) and code 03R the nestling was ringed at the Kidholmene colony (Kolding, East Jutland 55.31N-09.36E) on 26 May 2000.
The Netherlands several adult Great Cormorant

left GREEN C14
right GREEN with a bar in the middle

 mystery posted on November 2003, solved on 5/12/03 by Jacob Sterupthe Jacob Sterup

The vertical bar reported on the small ring is probably not an inscription but merely where the plastic overlaps and the white inner layer can be seen. Therefore it sounds like one of the Danish birds from 1996. Green C14 was ringed at Yderste Holm, Stavns Fjord in 1997, and does not have any small, green ring, so it cannot be this bird. However, 11 Cormorants ringed on Yderste Holm in 1996 with the code C 1 letter (C1H, C1J etc.) were given green helping rings. Interestingly, one of these, C1U, was seen in 1997 and 1998 at the same place from where the "mystery" bird has been reported.

UK