Can wisteria bees collect pollen?

Wisteria flowers are large and deep, which is not suitable for bees to collect honey.

So wisteria flowers attract big bees, such as bumblebees, wasps, wooden bees and so on.

Bees are small in size and short in mouthparts, but the nectar of wisteria flowers is hidden in the depths of the flowers, and bees can't collect honey.

When a big bee lands on wisteria, it can open its petals by its own weight and then suck nectar.