Heuglin's Gull (L. heuglini / antelius)
(last update: 26-2-2014) |
Coordinators:
Amir Ben Dov (Israel)
Chris Gibbins (Scotland)
Hannu Koskinen (Finland)
Mars Muusse (the Netherlands)
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Elegant structure in heuglini.
Structurally heuglini is typically more elegant with smaller head, slimmer, often droopy bill and longer legs than western taxa (for measurements see table 1 in Gibbins, 2004, after Olssen, 2003). For example, frequently the jizz of heuglini is comparable with Caspian Gull L. cachinnans, but not all are like this. Measurements and bill dimensions vary between sexes and individual variation in absolute size and relative structure cause extensive overlap between LBBG taxa. General structure and jizz are also variable to mood and temper. |
Heuglini adult, February 2009, United Arab Emirates. Picture: Chris Gibbins. Note the elegant structure: head and neck are not bulky or strong at all and the bill looks slender with weak gonys angle. (click image for link). |
Graellsii NLA 5.404.820 5cy, May 2011, IJmuiden, the Netherlands. Picture: Mars Muusse. Typical: strong bill with obvious gonydeal angle and strong neck, powerful bird. (click image for link). |
Heuglini adult, February 2009, United Arab Emirates. Picture: Chris Gibbins. Again, elegant proportions, almost cachinnans-like. (click image for link). |
Graellsii BTO GG-93433 adult, April 2002, Maasvlakte, the Netherlands. Picture: Mars Muusse. British bird, breeding in the Netherlands. Note strong neck. (click image for link). |
Heuglini adult, March 2011, Ashdod, Israel. Picture: Amir Ben Dov. Long-necked appearance with slender bill. (click image for link). |
Intermedius J850 adult, January 12 2010, Madrid, Spain. Picture: Delfín González. Note stocky, compact appearance and steep forehead. (click image for link). |
Heuglini adult, April 2011, Ashdod, Israel. Picture: Amir Ben Dov. S-shaped neck and droopy bill. (click image for link). |
Graellsii NLA 5.257.218 14cy, May 2002, Maasvlakte, the Netherlands. Picture: Mars Muusse. Example of fine bill. (click image for link). |
Heuglini adult, April 2011, Ashdod, Israel. Picture: Amir Ben Dov. Long-necked appearance with slender bill. (click image for link). |
Graellsii E734 11+cy, March 2010, IJmuiden, the Netherlands. Picture: Mars Muusse. Example of droopy bill. (click image for link). |
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