Thanks ! The bird's size matters a lot: It would be much more difficult to let this happen with these https://en.wikipedia.org/wiki/Great_black-backed_gull htt

Thanks ! The bird's size matters a lot: It would be much more difficult to let this happen with these https://en.wikipedia.org/wiki/Great_black-backed_gull https://en.wikipedia.org/wiki/Great_black-backed_gull