What birds have down feathers?

Down feathers are found in a wide variety of birds, including:

- Waterfowl, such as ducks, geese, and swans.

- Shorebirds, such as plovers, sandpipers, and avocets.

- Wading birds, such as herons, egrets, and ibis.

- Birds of prey, such as eagles, hawks, and owls.

- Passerines, such as songbirds, sparrows, and finches.