Honeybee watering hole

Not satisfied with their own hiveside water bowl, the honey bees have taken over the chicken water dish (they line up along the perimeter drinking), and now they have settled on the top of the water barrels as a favorite watering hole.So thirsty!  There are always about a dozen bees, often several dozen, drinking from the crease along the top of the water barrels.  It's a nice safe place for them to drink without falling in, so I have to pour more water on the top every day as the water evaporates otherwise.I can hear them humming around the barrels outside the window all day.They are hard to perturb when they're drinking, too.  You can nudge them, nudge nudge poke, and they'll hold on tighter, keeping that tongue dipping in the water.  Serious business.