BEEHAVE simulates the development of a honey bee colony and agent-based foraging of nectar and pollen in a realistic landscape. Varroa mites, transmitting DVW or APV, can be included as well as several beekeeping practices. BEEHAVE can be freely downloaded from this website. It comes together with a user manual and a detailed model description. BEEHAVE is implemented in the free, open source software NetLogo (http://ccl.northwestern.edu/netlogo/).