The Great Auk lived in the North Atlantic. They were sea birds that came ashore to breed, nesting on rocky shores in large colonies. The birds mated for life. The female bird laid a single egg, and both parents would care for the offspring. Great Auks had no defences against their major predator, man, and were killed in great numbers for food, feathers and as collectables. As they became more rare, they became more valuable, despite laws put in place to try to stop their extinction. The last Great Auk in Britain was shot in 1813. The last Great Auk sighting was recorded in Iceland in the middle of the 19th Century.