Birds are attracted to red and yellow flowers. Pollen does not readily stick to the bill, but does to the feathers. Hummingbird-pollinated flowers usually have a long, tubular corolla suited to their long beak. The pollen is normally large and sticky. G. Mammals 1.
Bats are usually active at night, so flowers they pollinate are often white.
When the rodent grasps the flower and inserts its tongue to probe for nectar, the pollen is released explosively from the anthers, dusting the rodent's face. The pollen grains are light, small, and are not sticky. The stamens are exposed to the wind so that the pollen can easily blow in the wind. The stigmas are feathery and exposed to the wind so that they can catch the pollen. The flowers are often grouped in inflorescences to facilitate pollen release and capture.