The phorid fly "Apocephalus borealis" oviposits into the abdomen of its hosts, including honey bees, causing them to abandon their nest, flying from it at night and soon dying, allowing the next generation of flies to emerge outside the hive.
The phorid fly "Apocephalus borealis" oviposits into the abdomen of honey bees (among other hosts), altering their behavior in the form of causing them to abandon their nest, flying from it at night. The bees die soon after that, allowing the next generation of flies to emerge within a week, outside the hive.