[BirdPhotoIndia] Heuglin's & Yellow-legged Gulls

Just want to confirm - in these pics, other than the lone Pallas's, the gulls with the black bills are the Yellow-legged, and the ones with the yellow bills are the Heuglin's Gulls, have I understood that correctly?

 

Goa, 25-09-10.

 

Thanks

Umesh

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Regards
Umesh Mani
Secunderabad

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