Hi @AlisonMilton, pretty sure this one is a female chestnut, though I see where the confusion stems from. They’re almost identical to Grey Teals save being a little bit darker around the face and slightly more speckled (I find the cheeks are usually the most obvious indicator of both of these). They often hang in and around Greys as well and frustratingly not always with the males.
@Rixon they are the same species, but Gulls are nearly impossible to tell apart based on gender. Instead, they are of different ages. The one of the right is a Juvenile, and the one on the left is an Immature.
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