Scott Morrical asked:
>Ruby-throated Hummers that were coming to my feeders all summer apparently did
>not show yesterday, and I suspect they have migrated. Actually they stayed a
>bit longer this year than is typical for my location. I am interested to know
>other observers' "last hummingbird dates" this year if you care to share them.
I have been keeping an eye on the same information, and over the years have
decided that (right here at least) September 7 is the last day, on average.
This year, the youngsters who were hatched here and have been avidly
draining the feeder all summer, left on September 4 or 5. On the 7th one
individual showed up, but it behaved quite differently and I guessed that
it was a migrant from further north.
As for the question about taking the feeder down, it seems to me that the
very fact that the youngsters have left is evidence that they are driven,
not by food, but by the length of daylight, so it is OK to leave the feeder
up all winter, if you want. I will leave mine out for at least a few more
days, just in case a few more hungry migrants come through.