As of December 2015, free bird feeder plans are available from websites for Birdwatching Bliss, Birds & Blooms, Wayne of the Woods, and Woodworking for Mere Mortals. The Birdwatching Bliss plans have step-by-step instructions with several accompanying photographs. The roofed feeder holds 1 gallon of birdseed. Its inner and outer perches allow birds of all sizes to access the food.
Birds & Blooms offers plans on its website for an oriole feeder. Dowel perches rest below nails that hold orange slices. The design is simple enough for a child to make it under adults supervision. It is possible to make this project using only scrap lumber.
Runner Duck Resources presents a bird feeder that holds a mixture of peanut butter and seeds. The feeder is shaped like the front of a house. The roof has cedar shingles. Birds sit on dowel perches to access food stuffed into the house's windows. Photographs illustrate the instructions.
Woodworking for Mere Mortals shows plans for an automatic bird feeder. A glass or plastic bottle stores seeds, which fall into the feeding compartment as needed. Aluminum mesh provides airflow so that seeds do not develop mold or mildew. A link at the end of the instructions connects to a PDF showing measurements for the individual components.