Drone honey bees do not forage for nectar or pollen. Adult butterflies feed on flower nectar and aphid honeydew. Megabats are mostly fruit, nectar and pollen eaters. They have even been observed partaking from hummingbird feeders, sweet nectar or sweetened water. Fears of honey contamination with toxic oleander nectar are therefore unsubstantiated. Their diet consists of nectar and plant juice. Worker larva are fed bee bread which is a mixture of nectar and pollen. Eucalyptus can produce even more manna than honeydew nectar. Megabats use smell to find food sources like fruit and nectar. This species primarily feeds on flowers, nectar and fruit. The flowers are pollinated by bees, attracted by nectar. The saguaro provides voluminous amounts of pollen, nectar, and fruits. Many animals pollinate flowers in exchange for food in the form of pollen or nectar. It supplements its diet with nectar and fruit. Adults feed mainly on nectar and pollen.