My two tbh's seem to be doing well (despite cross-combing that makes management less than fun). They've each built out about 18 bars and the traffic at the front of the hive is tremendous. I was wondering, just out of curiosity, if there's a way to estimate population based on that? My hive is about 12" tall, 18" wide at the top and 6" at the bottom.
As an aside, I was a bit disappointed not to find any capped honey (but lots of nectar) in there. Seems they should have been building stores, right? This is my first year at this and I have not been good about regular inspections. If fact I haven't looked inside since early July when I did see a little capped honey - and robbed about 10" square inches of comb 'cause I just HAD to try it!