In addition to bluebirds, our back yard aviary has hummingbirds. The nectar has to be replaced weekly because it gets moldy and the hummingbirds won’t drink it. Last night all feeders were taken down and cleaned. New nectar has to cool so the feeders weren’t back up at the crack of dawn.
Here is one hummingbird giving me the look. One of the feeders is next to a WOC. Feeders are back up now.