Hullo and Sviby are shallow (<4 m) bays on the southern coast of Vormsi island, off the west coast of Estonia. There are coastal meadows and small offshore islets.
Hullo and Sviby bays are important staging areas for migratory wildfowl, supporting more than 10,000 ducks and geese at peak counts.
BirdLife International (2020) Important Bird Areas factsheet: Hullo and Sviby bays. Downloaded from http://www.birdlife.org on 08/07/2020.