Hundreds of birds from as far south as Miami are falling from the sky or flying head-first into buildings and dying after being exposed to smoke from wildfires blanketing parts of Florida, according to a report.

Veterinarians said the birds have very sensitive lungs and the toxins in the smoke are poison to them, Local 6 reported Monday.

"I hear them (hitting glass) all day long," a business owner said. "It is horrible."

Residents in the counties have called wildlife centers to report the dead birds, the report said.

"Something is draining the life out of (an injured bird)," a man said after finding a bird that fell from the sky. "And it seems to be a slow process, which is pretty brutal."

Officials said smoke from the wildfires in Florida disorients the birds and causes them to fly into windows, according to a WSVN report.

The birds are dying from either the impact of the crash or suffering from head and neck injuries.

Wildfires started about a month ago in southeast Georgia and have spread into Florida. More than 300,000 acres have burned in both states.

The wildfire that raced through the Okefenokee Swamp in southeast Georgia and into Florida was started by lightning more than a week ago.

By Sunday night, it had burned 102,500 acres in Florida and was 30 percent contained. Georgia reported 41 wildfires in the state covering 267,136 acres.

Officials were also fighting a series of other, smaller fires throughout the state.

The fire burning in southeast Georgia and Florida started May 5 in the middle of the Okefenokee National Wildlife Refuge. It took just six days to grow larger than another wildfire that has burned nearly 121,000 acres of Georgia forest and swampland over more than three weeks. The smaller fire was started by a tree falling on a power line.

The Okefenokee National Wildlife Refuge and Georgia's Steven C. Foster State Park inside it remained closed.

Haze from the fires has traveled as far south as the Miami area, about 340 miles away.