Greater or Lesser Black Backed Gull

This Gull was seen on 10 October 2021 on Caribbean island of St.Kitts. Lesser BBG are seen every couple of years, but Greater BBG have been seen on very rare occasions in some neighboring islands such as Barbuda, Guadeloupe, Barbados, St. Croix etc. but only as a vagrant.

It is important to get a firm ID as it would be the first sighting of a Greater Black Backed Gull in St.Kitts. On another bird ID forum, nearly all posters believe it is a Greater BBG, but because of the location of the sighting so far south of the US, they want to see another known bird next to it to compare sizes, or to see it in flight! However, they all believe it is a Greater Black Backed Gull but are reluctant to confirm 100%. Can anyone give me their expertise on which Gull it is likely to be based on the attached photos? Thanks

  • Looks good for a 2nd winter GBB. Apart from anything else, that bill is unmistakable.
  • Also leg colour looks right for GBB

    Pete

    Birding is for everyone no matter how good or bad we are at it,enjoy it while you can

  • I'm also inclined to think it's a GBB. I'm going through some herring gull snaps at the moment and their beaks look positively dainty in comparison.

    Our herring gulls are red listed birds.  Think about that the next time you hear some flaming idiot calling for a cull of them.

  • Thank you everyone, your input was much appreciated. That is now a total of 9 in favor of the GBBG (including other bird id websites) and with one "most likely" to round off the 10 responses. We will submit to e-bird with explanations, and hopefully they will accept it.
    Once again, thank you for your assistance!
  • In reply to Clare:

    Claire, we just been watching quite a few juv. GBB Gulls on Lindisfarne they seemed to have had a decent breeding season in that area, maybe Bass Rock to the north

    Pete

    Birding is for everyone no matter how good or bad we are at it,enjoy it while you can

  • Pleased to hear that as I've got a bit of a soft spot for them. Not sure if they breed on the Bass Rock as I imagine that wouldn't please the gannets.

    Our herring gulls are red listed birds.  Think about that the next time you hear some flaming idiot calling for a cull of them.

  • In reply to Clare:

    Clare you may be right there I will see if I van delve into that one

    Pete

    Birding is for everyone no matter how good or bad we are at it,enjoy it while you can

  • I suspect they breed on the neighbouring rock of Craigleith.

    Our herring gulls are red listed birds.  Think about that the next time you hear some flaming idiot calling for a cull of them.