See how butterflies, bees, other insects and birds, in search of honey and nectar, help the plants to produce seeds that can germinate and become new plants, trees and shrubs. The seeds can be spread by wind or water, but nuts, fruits and berries with seeds can also be eaten and released elsewhere. Thus the many species in nature are interdependent. Plants that need help with pollination often have beautiful colors and they smell good to attract insects and birds. Thus, many plants depend on the help of insects and birds, but animals and insects also depend on the food they receive from the plants.