The birdseed mistake that can leave chickadees short on winter calories

The article explains how freezing temperatures affect small backyard birds and what they need to endure them. It recommends adding a specific high-calorie food to feeders and cautions against low-quality seed mixes.
The story focuses on a backyard feeding problem: when freezing temperatures arrive, small birds such as chickadees need enough energy to endure cold snaps. It cautions that low-quality seed mixes with filler may leave them short on winter calories, and it recommends adding a particular high-calorie food to feeders. Since the provided material does not identify that food or explain the full biology, the broader point is that what goes into a feeder can matter when cold weather arrives.
Backyard bird feeding is a popular pastime, so choices at feeders could have