Bees are supposed to be busy. Always on the move. Foraging, scouting, collecting, helping the hive thrive. But sometimes, you see a bee just sort of hanging out. Not moving. Not doing much of anything.
There may be a few reasons for this. First, it might be too cold. Bees’ flight muscles need to be held at specific temperatures in order to work properly. When it gets too cold (especially when it is too cold for the insect to shiver and thus raise muscle temperatures), they are grounded.
Another reason might be that the bee is old and tired. This might especially be the case if you notice ragged wings on the bee and it is later in the season.
It could also be possible that the bee (especially males) has forgotten to fuel up by drinking nectar during all of its flying around. No fuel means no energy.
I had a photo submission from 100twenty out in Southern Quebec. A quiet bumble was found hanging off the wild aster in Gatineau Park. One thing about grounded bees – they make for excellent photo opportunities