Length 56-66cm (22-26″).Very uncommon and irregular winter visitor to the Cayman Islands. Prefers inshore waters and harbours – often standing on top of jetty posts. Herring Gulls are capable of drinking seawater, by virtue of specialised glands which remove the salt. This is excreted as a hypersaline solution, which drips out from the nostrils – occasionally giving them the impression of having a “runny bill”.