This may be a stupid question, but I always read about beeks adding in a frame of dark comb (to a Nuc, or startup box), or 'Old comb' for baiting a trap use. Where do these come from? We have the two colonies, with 2 deeps each. These are the brood boxes and stores for the winter the way I understand it. The bees in those boxes will have those frames to use over and over and they will be theirs. When I add on honey Supers, that is comb drawn to fill with honey and harvest and I understand after extraction those will be cleaned up by bees and stored for next season, but they are also a "shallow" size or "Illinois" medium size, not the larger "deep" size. (in our case anyway)
Do the old frames filled with comb come from a failed colony? In my thinking all frames drawn are "in use" so not available. What information am I missing?