Bees and Lambs Ears

All of the lambs ears plants that I planted as little seedlings one and a half years ago, started to produce inflorescences a month ago. Now they are full of whorls of flowers that are blooming.

And the bees are loving the nectar the flowers produce.

Honey bees such as the one here love these flowers, visiting throughout the day.

Male wool carder bees also love the lambs ear plants and are very territorial about them. They sometimes bump honey bees off the flowers. But the honey bees just return for the nectar.

I wonder if the wool carder bees are so territorial because the females use the hairs from these plant leaves for constructing their nests.