This is a surprising statement. I wonder if Mr. Byaruhuanga was misquoted here, or his comment misconstrued. He may have been referring specifically to local crane populations in that part of Eastern Uganda. Both North American species of cranes are highly migratory, as are many Old World species.

According to the paper “A Review of the Biology and Conservation Status of Cranes,” authored by David G. Allen of the Avian Demography Unit in the Department of Statistical Sciences at Capetown University - which I found on the web site of the International Crane Foundation, an organization referenced as a source in the article:

“Most cranes of temperate regions are highly migratory, but those of more tropical regions show wide variations in the extent of their movements, from being totally sedentary, to evidencing nomadism, and regular or partial migration, including altitudinal migration.”