Whenever there are no more hummingbirds to feed. Hummingbirds migrate by internal calendars based on day length, no food availability, so leaving your feeder out will not stop them from migrating, A good rule of thumb is to leave your feeder up until two weeks after the first hard frost to provide extra energy for late-migrating hummingbirds.
they generally are gone south by the end of Sept
Don't stop! They know when to carry on about migrating. Stop when you have no birds.
When you feel like it!
Yes, my sister has them at her feeder in Middletown, Ct., near Hartford.
You stop feeding them when they die.
Most birds do not. However, hummingbirds may spread pollen when feeding on nectar from flowers.
Yes. They are called Sun birds there. No, there are no true Hummingbirds. The nectar feeding ecological niche is filled by a group of birds known as Sunbirds, which are larger than hummingbirds, but they share the ability to hover while sipping nectar from a flower (and pollinating it at the same time)
It's helpful not only to the flower, but to the environment. When hummingbirds visit flowers, they are not only feeding on the nectar, they pollinate the flowers which in turn allows plant to produce fruits or seeds.
When you stop feeding it
stop doing this
you don't have to stop hand feeding your lorikeet if you do though it just might make the lorikeet trust you more.
hummingbirds
Yes