Updated: 05/04/2014 7:42 PM
Created: 05/04/2014 10:56 AM KSTP.com
By: Megan Stewart
Twin Cities residents that saw low-flying helicopters across the metro Sunday can blame mosquitoes.
The state is home to over 50 different mosquito species. Metropolitan Mosquito Control District helicopters treated large breeding sites Sunday to prevent larvae from growing into biting adults.
Treatment works by applying a pellet containing a bacterium to wetlands and large areas of standing water that prevent larvae from growing into adult bugs. Treatments began in April.
The control district said residents can help stop mosquitos by cleaning out water holding containers, especially old tires.