This black-headed gull was off the car park at Pennington Flash today. I've circulated the photos to a few gull people and groups but it's raised very little interest and even less comment. In my opinion it's hood is very extensive for the species, reaching down the back of it's head while the bill is longer and heavier than I would expect and even a little drooped.
It probably is just a black-headed gull at the extreme end of the spectrum, while the heavy bill might make it a large male, but perhaps it might have some other genes. Black-headed gull x Mediterranean gull for example, perhaps a cross back.
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