I'm new to Beekeeping and installed a new package of bees with a clipped and marked Queen on 4/07 in a Top Bar Hive. I went to inspect on 4/14 and everything looked good. New comb had been built and the Queen had been released. When I walked away I noticed that maybe a couple 100 bees had clustered on the ground around some grass and another 50 or so were in another cluster about a foot away. On 4/15, they were still clustered on the ground. Any ideas what's happening with the bees on the ground.