In winter, it gets very cold and snowy. This makes it hard for birds to find food like seeds, berries, and bugs because they hide or are covered by snow.
So, people hang bird feeders outside. These feeders have special bird food inside. When birds come to eat the food, they get the energy they need to stay strong and warm during the cold winter days.
Hanging bird feeders is a kind and helpful way to take care of birds when nature makes food hard to find.