Where did my hummingbirds go?
Since my flowers have faded I have had a very large number (maybe a dozen individuals) of hummingbirds making good use of my feeders the last couple of months. We had a hard freeze last week and I brought the feeders in at night and replaced them at dawn. I have continued to keep them clean and fresh, but now no more hummers! Are they mad at me for bringing the food source at night? I've never seen them at night so I don't think that's it. Any reason they would all disappear all at the same time? I believe I had both Rufous and Anna's, both males and females. What happened? Is this normal?