What are the media for alien pollination?

"The question I want to ask is whether there is a medium for cross pollination?" Birds and bats.

1, bird pollination: some flowers are suitable for attracting birds, attracting birds to eat with bright colors and rich nectar, and getting pollen on themselves and taking it to other flowers.

2, bat pollination: some flowers are suitable for attracting bats, open at night, big flowers and strong smell, attracting bats to feed and pollinate.