The Iceland Gull closely resembles Thayer’s Gull—in fact, the two have often been treated as geographic races of a single, though variable, species. It nests in many different habitats, including Arctic tundra, small lakes in the boreal forest, natural and artificial islands in the Great Lakes, rooftops in cities, windswept islands in the Atlantic Ocean, and barrier beaches and saltmarshes in the eastern United States. It has a lot of Caspian Gull to it. BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! The Herring Gull is a large gull that can easily be confused with almost any of the other large gull species. A Herring Gull that resembles Caspian Gull in other ways –dark mantle, dull yellow bill –may easily be mistaken for Caspian Gull if P10 is viewed in isolation. Candidate birds may draw attention by slender-billed, long-legged, and slim appearance. The Royal tern is on the right with the orange bill. Its bright coral-red bill and black cap help to identify this bird in a … A Herring Gull that resembles Caspian Gull in other ways –dark mantle, dull yellow bill –may easily be mistaken for Caspian Gull if P10 is viewed in isolation. Possible Caspian Gull x Herring Gull hybrid This gull was photographed on November 28, 2011 and it is the fifth winter it returns to Aarhus Harbour. Below is an example of two different types of terns: In a flock of Royal terns on Coquina Beach I spotted this Sandwich tern (left). I spotted this beast yesterday. It nests around lakes in the interior of the west, and winters commonly along the Pacific Coast, including offshore waters. The Pacific coast is home to vast numbers of aptly named Western Gulls. Its plumage is OK for a Caspian Gull, but structurally it seems to be a bit mixed up. Once considered to be part of the same same species, Thayer's and Herring Gulls can appear quite similar at first glance.The pattern on the spread wing is very different between the two, but that doesn't help you with birds at rest. ... Below is a juvenile Herring gull. So rather than flog the dead horse of Kumlien's vs. Iceland vs. Thayer's, I'm just going to throw up a bunch of pictures of Thayer's and what they are most often confused with here; Herring, Glaucous-winged X Western Gull, and Glaucous-winged X Herring hybrids. I am sure one of the most important field marks for flying gulls are the primary tips. All photos were taken by local birder and finder Tim Hesselballe Hansen. A Herring Gull that resembles Caspian Gull in other ways –dark mantle, dull yellow bill –may easily be mistaken for Caspian Gull if P10 is viewed in isolation. Herring Gulls breed by the millions along the Great Lakes and Northeast waterways, while Laughing Gulls nest all along the Atlantic and Gulf coasts. It is therefore important to note the extent of black on the other primaries and to examine the full range of identification features for Caspian Gull. Possible Caspian Gull x Herring Gull hybrid This 1st winter gull was seen at Odense Kanal north of Odense on December 30, 2010. However, the ID adds a little uncomfortable feeling as the gull possesses some argentatus-jizz. The familiar Ring-billed Gull [Call of the Ring-billed Gull] nests all across the northern states and Canadian provinces. It differs from the Herring gull in having a much smaller bill, a darker eye, less black in the wing-tips and, often, a more rounded head. The legs of the Herring Gull … A classic adult Iceland Gull has all-white primaries and yellow eyes, and resembles a smaller, delicately built version of a Glaucous Gull. ... and great care is needed for correct identification. The adult wears the typical gull-like plumage of slate-gray back and wings, a white body and head, and black wingtips spotted with white. It is therefore important to note the extent of black on the other primaries and to examine the full range of identification features for Caspian Gull. An adult Scandinavian Herring Gull is featured at the end. The Herring Gull is the most numerous, widespread, and adaptable of the large gulls that breed in North America. 6)amount of black on open wing:as a rule,there is more black and less white on the primaries of YL Gull,esp.in comparison with northern argentatus Herrings(which are about as dark above as YL Gull,but have more white in the primaries than our argenteus Herrings). This dark-eyed gull has yellow legs and bill as an adult. Part of a complex of similar gulls, this bird closely resembles the Herring Gull or Ring-billed Gull, and is intermediate between those two in size. Caspian Gull also tends to be white-headed in winter,but differs as follows: Its short legs, chunky body and largish head hint at Herring Gull, but equally there is a bit of Caspian Gull about it too. Adults of both have a pale gray mantle. Anyway to see the difference of LBBG and Herring Gull, try to see the Yellow legs from the LBBG which the Herring Gull usually does not have and the Yellow of the LBBG is a very strong shiny yellow. Iceland Gull (Larus glaucoides) European Herring Gull (Larus argentatus) American Herring Gull (Larus smithsonianus) Vega Gull (Larus vegae) Caspian Gull (Larus cachinnans) Yellow-legged Gull (Larus michahellis) Armenian Gull (Larus armenicus) Slaty-backed Gull (Larus schistisagus) Lesser Black-backed Gull (Larus fuscus)