I noticed this bee one day, buzzing around this water cooler and then disappearing into the spill tray. Since then, I’ve seen it, or other similar bees, making the same journey to gather water from the tray and then, presumably, head back to the hive. Getting into the tray was the easy bit. Getting out tended to be more of a struggle.
Graham's Island 
Nice image of this little bee! Hope he water to bring back 🙂
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There’s usually some (clean) water in that tray so I think that’s why they keep coming back.
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