I usually don't take my feeder down for a while. Hummingbirds will migrate if they need to even if you're providing them with a food source. Their drive to migrate is a hormonal response to the change in daylength. So you don't really have to worry about leaving your feeder up too long. In fact, some experts believe it is beneficial to leave your feeder up at this time, so that the birds can store up before their migration.
I would be interested to hear some stories on how any of you deal with feeder guarding/competion, and multiple feeders. Some folks say place feeders far apart, some say cluster together at different heights. Some even say to make one feeder with a slightly higher concentration of sugar and space it away from the other feeders to draw the more aggressive birds to it. All I know is "our" female ruby throated, Claudette (yes we had to name her), doesn't let anyone else get anywhere near our feeder! There is a male that tries, and sometimes he has success when Claudette isn't looking, but not often.
Anyway, I'd been interested in your experiences.
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