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 death was an accident, officials said. It appears the man fell, and the cassowary attacked him after the fall, Taylor said.
Class II is the same category as alligators, honey badgers and clouded leopards, while Class I includes more traditional predators such as a lions, tigers and bears.
They can grow more than 5 feet tall and the heaviest females can weigh more than 160 pounds, the zoo says. Males weigh up to 120 pounds.
"The cassowary is rightfully considered the most dangerous bird in the world!" the zoo says. "Each 3-toed foot has a dagger-like claw on the inner toe that is up to 4 inches (10 centimeters) long! The cassowary can slice open any predator or potential threat with a single swift kick."