About 3 weeks back I placed a swarm in an undrawn topbar. They have made about 5-6 partial combs (2/3 of airspace filled per frame) but not one egg.
Must there be a critical mass of comb before egg laying?
I'd have thought there'd be eggs almost as soon as physically possible.
Pretty sure there is a queen, as the swarm came from a hive 50' away and would have expected them to abscond if she was missed.