(March 7, 2013)--A new study finds that bees get a shot of caffeine from the nectar of certain flowers, which perks up their memories.
The coffee plant is one of those flowers and it offers about as much concentrated caffeine as a cup of instant coffee.
Some citrus plants provide bees with caffeine too, although in lower concentrations.
Researchers found it in the nectar of orange and grapefruit blossoms.
The scientists used a lab experiment to show the caffeine dose boosts a bee's memory that a particular scent promises a tasty treat.
In the wild, that could help plants compete for a bee's pollination services.
The work was reported online Thursday in the journal Science.