It's right about sun down (still very light out though) and I noticed my bees are just milling around on the landing board. A couple are fanning but most are just milling about walking slowly around not coming or going. Whats the deal? It doesn't strike me as too concerning but I'm really curious why they do the things they do. It hasn't been hot or anything only about 75 today so it doesn't seem like heat would be an issue.