Vermont beekeepers face mite infestations, extreme temperature swings and the possibility of colony collapse. Last fall, a new threat emerged: zombie bees. Beekeeper Anthony Cantrell of Burlington discovered zombie bees in his hive in October, the first time they'd been found in the eastern United States. John Hafernik, a professor from San Francisco State University, discovered the first zombie bees in 2008. A fly called Apocephalus borealis attaches itself to the bee and injects its eggs, which grow inside the bee, Hafernik said. Scientists believe it causes neurological damage resulting in erratic, jerky movement and night activity, "like a zombie," Hafernik said.