After conducting the aerial survey in Minnesota, state biologists have determined that the moose population continues to decline. The survey for 2011 estimated the population to be 4,900, the 2012 survey estimated the population at 4,230. In 2006 the population was estimated at 8,840, it has been a declining situation ever since.
Along with an annual survey, radio collars are being used to conduct the research. They are used to track the animals, and to possibly learn more about the causes of death. In 2002, 150 moose were collared. Out of the 150, 119 have been found dead. Most from unknown causes thought to be diseases or parasites. Ten moose died as a result of highway vehicle accidents. Two were killed by trains. Only 11 deaths were clearly the result of wolf predation.