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Social behavior in animals --- Common tern - Reproduction. --- Common tern - Behavior. --- Social behavior in animals.

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A simpler and more user-friendly visual approach to gull identificationThis unique photographic field guide to North America's gulls provides a comparative approach to identification that concentrates on the size, structure, and basic plumage features of gulls-gone are the often-confusing array of plumage details found in traditional guides.Featuring hundreds of color photos throughout, Gulls Simplified illustrates the variations of gull plumages for a variety of ages, giving readers strong visual reference points for each species. Extensive captions accompany the photos, which include comparative photo arrays, digitized photo arrays for each age group, and numerous images of each species-a wealth of visual information at your fingertips. This one-of-a-kind guide includes detailed species accounts and a distribution map for each gull.An essential field companion for North American birders, Gulls Simplified reduces the confusion commonly associated with gull identification, offering a more user-friendly way of observing these marvelous birds.Provides a simpler approach to gull identificationFeatures a wealth of color photos for easy comparison among speciesIncludes detailed captions that explain identification criteria and aging, with direct visual reinforcement above the captionsCombines plumage details with a focus on size, body shape, and structural features for easy identification in the fieldHighlights important field marks and physical features for each gull

North America. --- Nordamerika. --- Albinism. --- American coot. --- American herring gull. --- American oystercatcher. --- Arctic fox. --- Audubon's shearwater. --- Auk. --- Bald eagle. --- Bird atlas. --- Bird migration. --- Black-headed gull. --- Black-legged kittiwake. --- Black-tailed gull. --- Blue-gray. --- Bonaparte's gull. --- Booby. --- Broad-winged hawk. --- Brown booby. --- Brown pelican. --- Bycatch. --- California gull. --- Caspian tern. --- Common gull. --- Common tern. --- Covert feather. --- Diving bird. --- Diving duck. --- Dogfish. --- Dowitcher. --- Dunlin. --- Egret. --- Eye color. --- Flight feather. --- Forster's tern. --- Franklin's gull. --- Gannet. --- Glaucous gull. --- Glaucous-winged gull. --- Glaucous. --- Great black-backed gull. --- Great shearwater. --- Gull wing. --- Gull. --- Halibut. --- Heermann's gull. --- Herring gull. --- Horseshoe crab. --- Iceland gull. --- Invertebrate. --- Ivory gull. --- Kelp gull. --- Larva. --- Laughing gull. --- Lesser black-backed gull. --- Lesser scaup. --- Little gull. --- Marine biology. --- Masked booby. --- Mormon cricket. --- Moulting. --- Northern flicker. --- Northern fulmar. --- Northern gannet. --- Northwestern crow. --- Ornithology. --- Pacific gull. --- Parasitic jaeger. --- Pelican. --- Phalarope. --- Piebald. --- Plover. --- Plumage. --- Red-breasted merganser. --- Ring-billed gull. --- Rollover Pass. --- Ross's gull. --- Royal tern. --- Sabine's gull. --- Sandpiper. --- Sandwich tern. --- Sea otter. --- Seabird. --- Seawater. --- Sharp-shinned hawk. --- Shearwater. --- Skua. --- Slaty-backed gull. --- Sooty shearwater. --- Southern California. --- Tern. --- Thayer's gull. --- The Sibley Guide to Birds. --- Tilapia. --- Vega gull. --- Wader. --- Warbler. --- Western gull. --- White tern. --- Yellow-footed gull. --- Yellow-legged gull.