Most feeder stations have at least one “workhorse” feeder. Quite often that feeder is a hopper feeder. This type of feeder can vary widely in design. From a simple open tray to a covered tray to a hopper feeder with some degree of seed storage, these feeders are great because they do not exclude any birds. These are often the only types of feeders that larger birds like Blue Jays, Mourning Dove and Northern Cardinals can feed at with relative ease. I think birds feel safer at these feeders because of the open viewing of their surroundings. Most hoppers and trays can be hung from a tree limb or shepherd’s hook, attached to deck railings, put atop a pole or post or even used as a ground tray by attaching four legs.