Bumblebees die in extreme heat, but there are other reasons too. Jay-Dee/Shutterstock You may be spotting bodies of dead bumblebees lying across pavements near you in the summer months. There are several reasons for this, some to do with the weather and some very much due to humans. Bumblebees are social, living in colonies that are maintained by very active workers with a relatively short lifespan of 4-6 weeks. This means, that in a relatively short space of time, older bees die off and to pr