Definition
A 'boatswain bird' is a historical term for tropicbirds, seabirds known for their elegant white plumage and long tail feathers. Sailors often used this name because the birds' calls resembled the boatswain's whistle on a ship. It's an old nautical term, reflecting the connection between sailors and these ocean-dwelling birds. Picture a feathered sailor soaring above the waves! They are expert fliers and divers, catching fish and squid in tropical waters.