The Heliornithidae are a small family of tropical birds with webbed lobes on their feet like those of grebes and coots. The family overall are known as finfoots, although one species is known as a sungrebe. The family is composed of three species in three genera.
Finfoots are found in numerous habitats in the tropics as long as there is water and cover. It is uncertain why cover is so essential to finfoots, but they are extremely secretive and often overlooked. Their ranges extend from coastal creeks to fast-moving mountain streams, most commonly being found in large slow moving bodies of water. They also use swamps, reed beds, mangroves, and forest. Finfoots are territorial, probably for much of the year and certainly when breeding. They are not thought to undertake regular migrations, but some birds do regularly disperse and they are quick to colonise new areas of suitable habitat.