WASHINGTON (Reuter) - Female wasps fed up with greedy males know what to do with them -- they stuff them headfirst into holes, scientists said. "It's a strikingly aggressive behavior," said behaviorist Philip Starks at Cornell University, who worked on the study. Starks said wasps were known to be aggressive, but that this especially harsh behavior was remarkable. In a report in the science journal Nature, they described watching female paper wasps who were bringing food back to the colony. The insects first touched antennas, after which the females wrestled down the males, bit and stung them, and then stuffed them headfirst into empty nest cells. The males, who do not have stingers, are then "repeat stuffed" into the cells until they are well and truly jammed in. Emily Poe, who also worked on the study, said the behavior actually made sense. "Limiting food consumption by males may maximize the worker's inclusive fitness," she said in a statement. "If you look at their behavior, it gets the males out of the way. This contributes to the colony's fitness."