Scientists Discover Bees That Change Color Based on Humidity

Scientists have recently discovered a fascinating phenomenon in nature: the fine-striped sweat bee (*Agapostemon subtilior*) can change color based on humidity levels.

When humidity is low (below 10%), the bees appear blue-green, but as moisture increases to 95%, they shift to a coppery green.

This color change occurs because water molecules enter the bee's iridescent exoskeleton, causing its microscopic layers to swell.

Unlike color changes caused by diet or genetics, this is a purely physical reaction, requiring no energy from the bee.

Experts believe this shift might serve as dynamic camouflage, helping the insects blend into their surroundings as moisture darkens surfaces like soil and bark.

This discovery suggests that many other iridescent insects may share this overlooked, moisture-dependent ability.