Watch the sequence in this thread.

Mr. Ruby-throat had noticed the feeder was empty. He sat in the crabapple tree as it disappeared into the house with the woman. Later, she hung it out again. Time for action...
@CAScrubJay

He waited until there was no motion on the porch... then flew to the feeder to look it over. Was it refilled? He could see the fluid through the glass...

Yes! It was refilled! He wheeled away to get in a safer position!

Time for a fresh drink! (End of thread)