  
The traditional hopper is popular
and prevalent. Due to its straight-forward simplicity, a hopper
feeder often is the one people choose when they first start
feeding the birds. As the name implies, a hopper feeder is a
box-like storage and dispensing system that not only makes seed
available for birds on demand but usually has a roof to help keep
seed dry. It stores seed and automatically replenishes it in the
feeder port, usually through gravity, until the hopper is empty.
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