How to merge two colonies

On the colony card, under “Available actions”, tap “Unite”. Choose the second colony and the date.

The app then asks about each of the queens involved: whether she stays “in the united colony”, ends up “without a colony”, is “culled”, “sold” or “dead”. If the united colony would end up with two queens, you get a warning.

Once you confirm, one colony carries on and the other gets the state “Merged”. Both pedigrees show it, from either side: “Merged in:” and “Merged into:”.