http://news.nationalgeographic.com/news/2006/08/060802-warm-flowers.html

Bees like it hot

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A bumblebee alights on top of a flower in this infrared image

Image: BEEgroup Wrzburg, University of Wrzburg/Nature

“Bumblebees prefer their food warm and learn to locate hotter flowers using color as a cue, scientists say. The findings may have broad implications for the evolution of flowering plants.

To attract insect pollinators, flowers offer a nutritious reward of nectar and pollen. Now biologists say many flowers may encourage visits by offering a “heat reward” as well. By consuming warmer nectar, bees may save energy they would otherwise have to spend maintaining their own body temperature.”

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