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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Juvenile Gull, UK, 14-09-21 (1 Viewer)

GMS

Well-known member
Would appreciate thoughts on this gull. Stood out based on white (but still well marked rump) and clean black tail band. Photos are slightly dark, as they were taken just before sunset.
The bird has some odd brownish colouration going from the back onto the rump. Primary window relatively week but clearly visible. Overall quite dark. Looks to have a number of new almost rufous scaps, although you need to look closely to see this. Eyemask present but realise many Herring Gulls have this.

Thoughts welcome.20210914_080120.jpg
 

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I can't see anything to exclude a juvenile European Herring Gull. Such pale inner primary window is too well defined for LBBG. Notched tertial fringes, relatively short wings and legs also typical of EHG.

Edit: pic 4 is a different bird and I would hesitate to name that bird to species. Note lack of notching to the tertial fringes and different greater covert pattern. Quite probably a LBBG...
 
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