I did a thorough check of one of my newer hives yesterday (purchased in May) pulling each frame and making notes on what I found. I noticed that on some of the frames the bees were really small, while on other frames the bees seemed much larger. My question is: are the new bees the nurse bees? Are they just smaller than the older forager bees? Also, I noticed the bees were different colors as well, ie., some lighter brown and others with darker stripes or even black bodies. Any insight?