Abstract: A squirrel-proof selective bird feeder includes a metallic hopper having integral side walls and a back wall defining an open front face, an open top, and a feed portal, a translucent window fastened in water-resistant sealing engagement to the open front face, a top having a sandwiched metallic plate slidably mounted in and frictionally retained by the confronting walls of the open top of the hopper, and a spring-loaded perch having an adjustable tension pivotally mounted to the bottom of the hopper and adjacent the feed portal. In the case of a light bird alighting on the perch having a weight less than that needed to overcome the spring force, the perch remains in at least a partially open state allowing access to the feed portal. In the case of a squirrel or heavy bird having a weight that overcomes the spring force, the perch pivots to a closed state that prevents access to the feed portal.