(CNN) A cassowary, a giant bird with long claws on each foot, killed its owner after he fell in the backyard of his Gainesville, Florida, home, officials told CNN.

The bird's owner, Marvin Hajos -- who is 75, according to CNN affiliate WCJB -- made the initial call to 911 Friday about 10 a.m. ET. A second call came from another person at the scene who reported a medical emergency involving a large bird, said Lt. Joshua Crews of the Alachua County Sheriff's Office.

Hajos was transported to a nearby hospital, where he died, the lieutenant said. The cassowary remains on Hajos' property as authorities conduct an investigation into the attack, he said.

The owner was a breeder of the rare bird that is native to Australia and New Guinea, Alachua County Deputy Fire Chief Jeff Taylor said.

The death was an accident, officials said. It appears the man fell, and the cassowary attacked him after the fall, Taylor said.

Read More