 The chill @-@ coma temperature in relation to flying insects is the temperature at which flight muscles cannot be activated . Compared to honey bees and carpenter bees , bumblebees have the lowest chill @-@ coma temperature . Of the bumblebees Bombus bimaculatus has the lowest at 7 ° C ( 45 ° F ) . However , bumblebees have been seen to fly in colder ambient temperatures . This discrepancy is likely because the chill @-@ coma temperature was determined by tests done in a laboratory setting . However , bumblebees live in insulated shelters and can shiver to warm up before venturing into the cold . 
