Much to our surprise, we saw a female hummingbird on the feeder at lunch time.  It's Sept. 17,  after all, about as far north as they get in their summer migration in. North America We saw one on Monday, and felt certain it was our last sighting.  It's definitely time for them to be heading south. with cool nighttime temperatures. This one spent a long time at the feeder, loading up with sugary liquid.  There are abundant small insects still, so that's good.  They make up roughly half of a hummingbird's diet.