"I guess it's like bee keeping: regional. Around here if you leave feeders up, the hummers stay longer and can get caught by an early frost and die."
pete, birds and insects, including honey bees, are 'smarter' than we are, to a degree that i think we will never know or understand but can only appreciate their innate or natural 'instincts' and perhaps maybe learn what makes that 'tick' in their world, their biology, their behavior. that said, i can only think that we have been falsely taught to remove hummingbird feeders because they are too dumb to figure out they need to move south. i don't believe this is true and they are not dumb. i think what you are seeing is those hummers migrating and coming through from further north of you, and when the migration ceases, pull the feeders. just my observation of hummingbirds. i really don't think they stay longer, they move south when their time clock says so, and i think what you have are hummers that are migrating and moving south from your location.
like you pete, as far as open feeding for honey bees.....i disagree with this also and don't practice this. for me it causes too many problems and am conscious of others who may have hives near me....even though they don't care what they do....i do.
others this might work for, for me it doesn't. like rat said "Put the feed out and keep it full. There will be keep in the neighborhood that will be baffled when there is a flow on in the middle of a drought.
and when they take the 'honey' off it will taste like.........and not be honey......