Southern bird species use various strategies to survive winter:
- Migration: Many move to warmer climates with abundant food.
- Food Caching: Some store seeds, nuts, and insects during summer and fall for winter consumption.
- Thermogenesis: They generate body heat by increasing metabolism, fluffing feathers, huddling, and seeking sunny spots.
- High-Calorie Foods: They eat energy-rich seeds, nuts, fruits, and insects.
- Finding Shelter: They roost in dense vegetation, tree cavities, and birdhouses.
- Torpor: Some enter a lowered metabolic state to conserve energy during severe weather.
- Adaptive Plumage: Some grow thicker, more insulating feathers in winter.