Knots, known as red knots in America as a result of their lovely red summer plumage, are stocky wading and shore birds. They undertake one of the longest migrations of any animal from their Arctic breeding grounds to the coasts and estuaries of Europe, Africa and Australia where they spend the winter feasting on invertebrates. They often form large, wheeling flocks that contain in excess of 100,000 birds.
Scientific name: Calidris canutus
Species range provided by WWF's Wildfinder.
The following habitats are found across the Knot distribution range. Find out more about these environments, what it takes to live there and what else inhabits them.
Discover what these behaviours are and how different plants and animals use them.
Additional data source: Animal Diversity Web
Year assessed: 2009
Classified by: IUCN 3.1
Take a trip through the natural world with our themed collections of video clips from the natural history archive.
Watch the year's highlights from the BBC's exploration of the planet's hidden corners and rarest creatures: from the turquoise seas of the South Pacific to the Lost Land of the Volcano.
In autumn 2009, a major new series brought us life as we've never seen it before.
Autumn - a time of great change, of breathtaking migrations, of high drama.