(24 PICTS: 01-2------------------------------------------------------------------------------------------------------------------------------------------4)

2 Bonaparte's Gull Larus philadelphia

On 6th May 2007 I found a 2nd calendar year Bonaparte's Gull in the western part

of the Port of Rotterdam. It was the third time I found this species in late spring in

the SW part of The Netherlands. Increasingly species of New World origin are seen 

during spring at this latitude. I speculate that these birds strayed to North Africa and

southern Europe in autumn and migrate northward in spring and eventually returning

to Canada via the shortest route crossing the North Atlantic. A summer plumaged adult

similar to the one I found on 6th May 2004 (sorry for the very vague pictures!) was seen

a week later in NW England fitting the speculation. 

It is interesting to see that the legs of this year's immature bird are darker, reddish-brown
 
instead of pink, than during winter, I have not seen this mentioned before but a 1st summer
 
bird photographed 25th May 1984 in California by Harry J.Lehto (plate 670 on p.472 in
 
Gulls by Malling Olsen & Larsson) shows the same dark legs.

1-blackheadedgulls- 2-bonapartegulls- 3-mediterraneangulls- 4-littlegulls 5-franklin'sgulls


01 Bonaparte's Gull Larus philadelphia 2CY 03052007 1 Rotterdam

01 Bonaparte's Gull Larus philadelphia 2CY 03052007 1 Rotterdam, The Netherlands, c Norman Deans van Swelm


02 Bonaparte's Gull Larus philadelphia 2CY 03052007 Rotterdam

02 Bonaparte's Gull Larus philadelphia 2CY 03052007 Rotterdam, The Netherlands, c Norman Deans van Swelm


03 Bonaparte's Gull Larus philadelphia 2CY 03052007 3 Rotterdam

03 Bonaparte's Gull Larus philadelphia 2CY 03052007 3 Rotterdam, The Netherlands, c Norman Deans van Swelm


04 Bonaparte's Gull Larus philadelphia 2CY 03052007 2 Rotterdam

04 Bonaparte's Gull Larus philadelphia 2CY 03052007 2 Rotterdam, The Netherlands, c Norman Deans van Swelm


05 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 1 Rotterdam

05 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 1 Rotterdam, The Netherlands, c Norman Deans van Swelm


06 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 4 Rotterdam

06 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 4 Rotterdam, The Netherlands, c Norman Deans van Swelm


07 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 3 Rotterdam

07 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 3 Rotterdam, The Netherlands, c Norman Deans van Swelm


08 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 2 Rotterdam

08 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 2 Rotterdam, The Netherlands, c Norman Deans van Swelm


09 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 5 Rotterdam

09 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 5 Rotterdam, The Netherlands, c Norman Deans van Swelm


10 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 6 Rotterdam

10 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 6 Rotterdam, The Netherlands, c Norman Deans van Swelm


11 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 Rotterdam

11 Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 Rotterdam, The Netherlands, c Norman Deans van Swelm


12 Bonaparte's Gull Larus philadelphia 06052004 Maasvlakte, Rotterdam

12 Bonaparte's Gull Larus philadelphia 06052004 Maasvlakte, Rotterdam, The Netherlands, c Norman Deans van Swelm


13 Bonaparte's Gull Larus philadelphia 06052004 Maasvlakte,Rotterdam<13 Bonaparte's Gull Larus philadelphia 06052004 Maasvlakte,

Rotterdam, The Netherlands, c Norman Deans van Swelm


14 Bonaparte's Gull Larus philadelphia 1993 Churchill, Canada c A.& P.de Knijffweb

14 Bonaparte's Gull Larus philadelphia 1993 Churchill, Canada - c A.& P.de Knijff


15 Bonaparte's Gull Larus philadelphia 2CY 1993 Churchill, Canada c A.&. P.de Knijffweb

15 Bonaparte's Gull Larus philadelphia 2CY 1993 Churchill, Canada - c A.&. P.de Knijff


16 Bonaparte's Gull Larus philadelphia adult 1993 Churchill, Canada c A.&.P.de Knijffweb

16 Bonaparte's Gull Larus philadelphia adult 1993 Churchill, Canada - c A.&.P.de Knijff


17a-17b Bonaparte's Gull June 1993 Churchill,Canada 2CY bill details c A. & P.de Knijffweb

17a Bonaparte's Gull Larus philadelphia 2CY 03052007 Rotterdam bill details-

17b Bonaparte's Gull June 1993 Churchill,Canada 2CY bill details - c A. & P.de Knijff


18a-18b-18c Bonaparte's Gull Larus philadelphia 2CY 03052007 Rotterdam leg detailsweb

18a Bonaparte's Gull Larus philadelphia 2CY 03052007 Rotterdam leg details

18b-18c Bonaparte's Gull June 1993 Churchill,Canada 2CY leg details c A. & P.de Knijff


compair:

19a-19b Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 Rotterdamweb19a-19b

19a Bonaparte's Gull Larus philadelphia 2CY in flight 03052007 Rotterdam, The Netherlands, c Norman Deans van Swelm

19b Black-headed Gull Larus ridibundus 2CY 10052007 Stellendam, The Netherlands, c Norman Deans van Swelm


20. Bonaparte's Gull Larus philadelphia 1CY 23082007 Strypse Wetering,Rockanje,The Netherlands .jpg

20 Bonaparte's Gull Larus philadelphia 1CY 23082007 Strypse Wetering,Rockanje, The Netherlands, c Norman Deans van Swelm


21. Bonaparte's Gull Larus philadelphia 23082007 Rockanje, The Netherlands

21 Bonaparte's Gull Larus philadelphia 23082007 Rockanje, The Netherlands, c Norman Deans van Swelm


2-bonaparte13/Bonaparte's Gull Larus philadelphia ad 03112011 4018 Haringvlietsluizen, nl, N.D.v.Swelm.jpg

22 Bonaparte's Gull Larus philadelphia ad 03112011 4018 Haringvlietsluizen, The Netherlands, c Norman Deans van Swelm


2-bonaparte13/Bonaparte's Gull Larus philadelphia 1W 03112000 Stellendam, nl, N.D.v.Swelm.jpg

23 Bonaparte's Gull Larus philadelphia 1W 03112000 Stellendam, The Netherlands, c Norman Deans van Swelm


2-bonaparte13/Bonaparte's Gull Larus philadelphia ad 03112000 Stellendam, nl, N.D.v.Swelm.jpg

24 Bonaparte's Gull Larus philadelphia ad 03112000 Stellendam, The Netherlands, c Norman Deans van Swelm


blackheaded gulls
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