The red-billed gull (or mackarel gull) is a small gull about the same size as the black-billed gull. In addition to the red bill and legs, it has a red circle around its yellow eyes. It is native to New Zealand and widespread. It nests in large colonies, at times with the black-billed gull, with which they can interbreed. As with many gulls, it is a scavenger that has adapted well to human habitats. The red-billed gull is also a ‘kleptoparasite’ (parasite by theft), i.e. it will steal the food caught by other birds.