I just saw this insect collecting polen from bougainvillea blossoms on the Greek island of Skyros, in the Aegean sea. For future reference, this is in the middle of August and the sighting was at around 17:00.
I posted all 4 photos I took since the rude little thing didn't have the decency to sit still to let me get a clear shot. I'd say it was about 2cm long, certainly no more than 3.