DARIEN — It’s a bird, it’s a plane, it’s a helicopter.

Darien residents can expect to see low flying helicopters in the next week or so as Eversource conducts inspections of their high voltage electrical equipment in north central Connecticut.

Darien police said residents should not be alarmed by the aircraft.

“Although observing a low-flying aircraft can be alarming in nature, we can assure you that these inspections are authorized, safe and necessary,” said Sgt. Jeremiah Marron of the Darien police. “Please do not contact the police department with inquiries. Thank you for your cooperation.”

According to Eversource, these inspections are important in maintaining good electrical service for Connecticut residents.

“Over a million customers in Connecticut depend on us every day for reliable electric service,” said Craig Hallstrom, regional electric operations president at Eversource, in a statement. “These helicopter inspections of our transmission lines are a crucial part of our commitment to reducing the frequency and duration of power outages.”

The helicopters have a high resolution camera that can detect potential equipment issues and allows the company to plan maintenance and upgrades accordingly. Inspections began in the morning of Sept. 21 in Fairfield County and will begin this week in Litchfield and Hartford counties.

Eversource said they are expected to take up to three weeks and will occur between 7 a.m. and 5 p.m. The company will be using two black MD500 helicopters with registration numbers N371EE and N500LK.

ekayata@hearstmediact.com; @erin_kayata