Conservationists are tracking endangered red-breasted geese to solve the mystery of thousands of birds lost in migration.
More than 90 birds were caught and tagged in Bulgaria to try to find out what happened to geese that disappeared from their wintering grounds along the Black Sea about 10 years ago.
Experts from the Wildfowl and Wetlands Trust (WWT) are working with the Bulgarian Society for the Protection of Birds (BSPB) to identify whether the birds found a new site in Asia or fell victim to hunting, development or changes in farming.
Peter Cranswick, head of species recovery at WWT, said: “The data we get will be invaluable to our work with local communities in Bulgaria to work out how we support the remaining geese.”
