Peanut Butter Jar Winter Bird Feeder

By using peanut butter jars instead of suet balls, the birds get the necessary fats and protein they need. When the temperature drops, the peanut butter firms up, requiring the birds to peck at the contents much like they would with a standard suet cake, ensuring the food lasts longer and remains accessible.

Note: While my model was built from the ground up to fit a certain Norwegian brand with specific dimensions, the core concept and design are heavily inspired by the excellent work of "The Recreational Machinist." His original ideas are fantastic, and I highly encourage you to check out his designs first. 

The feeder is optimized for jars commonly found in Norwegian grocery stores. To ensure compatibility with your own jars, the dimensions are tailored for a diameter of 75mm and a height of 88mm from the base to the lid rim. The interior of the feeder features a dedicated lip designed to catch the rim of the jar once the lid is removed, ensuring it sits securely and won't slide out during use.

For added security, the screw-on perch acts as a secondary locking mechanism to keep the jar firmly in place. 

To ensure durability in harsh conditions, the design includes two mounting holes at the rear for easy installation. Additionally, I have made small drainage holes at the bottom to prevent water buildup.