We have a lot native datura moonflower growing around where I live. And I can tell you first hand. They bloom at night. But the blooms last into the morning hours when humming birds are active. I am not aware of any other night blooming plants other than a few cacti here. And humming birds are their chief pollinators.
Perhaps the moth of the tomato horned worm is the only insect pollinator for these types of flowers during the night. But there are non-insects like humming birds that can and do pollinate these flowers before the blooms die off in the early morning hours.
