Winter is coming whether you like it or not. I am already brainstorming on how to winter me bees this year. I found this cool study with Infrared thermogram pics of clusters. Pretty interesting stuff.
Sometimes My links dont show up so hopefully there is one below this sentence
http://jeb.biologists.org/cgi/reprint/206/2/353.pdf (http://jeb.biologists.org/cgi/reprint/206/2/353.pdf)