The lake district that has formed in southern part of Tyumen Oblast between the Ishim and Tobol Rivers serves as the perfect habitat for the many species of birds that live there. The Tobol-Ishim interfluve is located along one of the most popular routes that migrating birds travel, and each summer many geese, ducks and gannets nest here. Dozens of other seabirds do the same, including the Dalmatian Pelican, a feathered inhabitant from further north in Western Siberia.