I arrived home Wednesday evening, put seed into the completely empty feeder on Thursday morning, but did not notice one bird in the backyard during the day. There was evidence a squirrel had jumped onto the roof of the feeder but didn't hang around. Metal Sentinal had done his job, scared it away.
This morning the action started early and continues feverishly while I write this note. Happy camper, that's me.
Link to more Bird Watching