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N.D. (AP) — Whooping cranes are in the midst of their spring migration, and the endangered birds will be making their way through North Dakota in coming weeks.

The Game and Fish Department is asking anyone who spots a whooper to report the sighting to state or federal wildlife officials so the birds can be tracked. The birds are federally protected, so people are cautioned not to disturb them.

Whooping cranes stand about 5 feet tall and have a wingspan of about 7 feet. They are bright white with black wing tips. In flight, they extend their long necks straight forward, and their legs extend out behind them. They usually fly alone or in small groups.

Officials say people should be careful not to mistake snow geese, swans, egrets and pelicans for whoopers.