A guild is a group of organisms that share a common resource in their environment. In the case of
predator guilds, this resource is prey and the members of the guild compete with one another for prey. This shared prey resource can create competitive displacement, a situation where perhaps species A exploits the resource at night and species B during the day. This shared prey resource can also create predator opportunities to engage in intraguild predation, i.e. eating the competition. A simple but effective strategy to reduce competition.
The picture at left was taken April 2012 in the parking lot of a grocery store in Twin Falls, Idaho. I do not know if the adult ladybug is eating lady bug eggs laid by the same or a different ladybug species. I do know that pictures like this explain why sometimes Kelly has to wait an inordinately long time for me to return a shopping cart to the store.