The tree wasp Dolichovespula sylvestris also displays worker policing.
Temnothorax unifasciatus, a myrmicinid ant, has been shown not to have collective worker policing.
Experiments by Foster showed that the workers were instead regulating sterility in each other, thus instead exhibiting worker policing.
After controlling for the absolute number of eggs laid, these scientists conclude that the queen's multiple matings favor mutual worker policing.
Our study investigates worker policing behaviour across colony development and addresses both the proximate and ultimate causes of worker policing in social insect colonies.
For example, receptors of the pheromone that marks queen but not worker eggs in honeybees, and therefore allows worker policing [ 49], may be imprinted.
They were working-class people: soldiers, construction workers, police officers.
Plumes of smoke rose as rescue workers, police officials and residents swarmed the blast site.
What about the sanitation workers, police officers, pothole fillers and other providers of city services?
Bailly watched construction workers, police, and people run toward the site.
