The second-winter Herring can also suggest a first ... Range still expanding in many areas, and today the ring-billed may be the most populous gull in North America, with an estimated 3 to 4 ...

The most widespread pink-legged gull in ... unlike herring’s more solidly dark wing tip. (Some herring x glaucous-winged hybrids very like Thayer’s in plumage, but bigger-billed.) ...

Many years, ring-billed gulls are the most common wintering gull in Kansas ... Ringbills commonly mix with herring gulls, which lack the black ring on their bill, and also have a much larger ...