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herring gull |
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herring gullMost common of the Atlantic gulls in the Northern Hemisphere. The herring gull (Larus argentatus) has a gray mantle, flesh-coloured legs and feet, and black-and-white-spotted wing tips. Herring gulls are primarily scavengers; their populations are generally increasing because of expanding food supplies, chiefly garbage and sewage in or near coastal waters. |
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Quinn of McMaster University in Hamilton, Ontario, found an abnormally large number of mutations in herring gulls nesting near steel mills. However, studies on fish-eating birds such as the herring gull (Larus argentatus) from the Great Lakes in North America have provided strong evidence that hypothyroidism in this species was due not to iodine deficiency but to exposure to halogenated organic contaminants, although the disruptive mechanisms suggested were speculative (Fox 1993; McNabb and Fox 2003; Moccia et al. Poisonous margarine-on-white-bread sandwiches were planted in the nests of roughly 5,700 breeding great black backed and herring gulls on Monomoy National Wildlife Refuge, near Chatham. |
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herring gull
