NUC is short for “nucleus colony of bees.” It has everything a large full spring-time colony has, only less of everything. Larger established colonies have 20-30 or more frames which are in multiple boxes stacked on top of each other to make up one hive containing 40,000 or more bees. In contrast, NUCs are generally sold as 4 or 5 frame NUCs and come in a single small box containing about 10,000 bees. A good NUC should have a young (a few months old) local queen, which has been laying in the frame cells for several weeks. You should see at least two or three frames of eggs, larvae, and capped brood. There should be some pollen and honey stored on the frames. It is better if all frames have drawn comb, but some producers sell 5 frame NUCs with 4 drawn frames and 1 new frame, which should really be considered a 4 frame NUC. The NUC should be full of bees crawling on all frames. Think of crowded, as you’ll need to transfer to a large hive box ASAP, when you get them home. NUCs