Not only are they an enjoyment to watch but birds and butterflies play a very important role in pollination, distributing seeds and helping to control unwanted insect pests.   To begin attracting them to your yard and garden, you must provide sources of food, shelter and water.   Food can be provided in the form of nectar, seeds, nuts and berries.  When selecting plants, choose varieties with a long bloom time. Shelter can be given with various large trees or evergreen trees plus additional bird houses.  Water elements siuch as ponds, fountains and bird baths can create that necessary drinking source.