Which pollinators commonly visit Faboideae flowers?

The flowers of the subfamily Faboideae (also known as Papilionoideae) are primarily adapted for pollination by insects.12

The unique, bilaterally symmetric (zygomorphic) design of these flowers—featuring a banner petal, two wing petals, and a fused keel—is specifically structured to facilitate insect visits. Insects are typically attracted to these flowers by the presence of sweet nectar, which is signaled by the plant's colored petals.12

While insects are the primary pollinators, a few members of the group are pollinated by hummingbirds. Additionally, some Faboideae species utilize various locking and releasing mechanisms within their floral structures to control pollination, which can favor either outcrossing or self-pollination. In some cases, such as in the genus Lespedeza, plants produce cleistogamous flowers that do not open, thereby enforcing self-pollination and preventing insect entry entirely.12