Parasite zombie flies and a honeybee
Honeybees (Apis mellifera) in California and South Dakota have been observed acting zombielike, wandering away from their hives at night and crawling around blindly in circles.

These insects have been rendered insensate by a parasitizing fly that lays eggs in the bees’ bodies. After the bee dies a lonesome death, pupae crawl out and grow to adult flies that seek new bodies to infect.

Such a sight startled John Hafernik, a professor of biology at San Francisco State University, when he looked at dead honey bees he had collected on campus. He soon started noticing clumps of dead bees under light fixtures in the area. He and his colleagues found that this bizarre bee behavior was the result of the fly Apocephalus borealis (they described their findings in January in the journal PLoS ONE). After sampling hives around the Bay Area, they found that, disturbingly, more than three quarters were infected with this parasite.


How do you catch a zombie bee?
Honeybee colonies have been collapsing at an alarming rate in the U.S. for the past several years. And without these important pollinators, many of our favorite foods, from almonds to zucchini would be difficult to produce. Scientists have implicated viruses, fungi, mites and other invaders in colony collapse disorder, but Hafernik suspects this parasite is a new villain on the scene. “Honeybees are among the best-studied insects,” he said in a prepared statement in January. “We would expect that if this has been a long-term parasite of honeybees, we would have noticed.”







Source: Are Zombie Bees Infiltrating Your Neighborhood? | Observations, Scientific American Blog Network