Bees in the Bishop's Children Dahlias

This is the first time I planted a Bishop's Children Dahlia x hybrida .
It is growing in a 7 gallon pot and thriving.
What is interesting about these plants is that you never know what color the blossoms will be.
I thought the blossoms would be different colors, but all them are this same vibrant shade of red.
Bees are constant visitors for the dahlia's nectar and pollen.
In a recent post there were images of the Yellow Faced Bumble Bee.
In the above image is a honey bee foraging for nectar.

And here is a leaf cutter bee in another blossom.

The leaf cutter bee is flying away from that blossom to another.