Usually early in the morning or late afternoon. Lately I have been seeing them all day long. For the past hour here in my corner of southeast Alabama they have been feeding and fighting like crazy. I was deadheading some salvias and they were zipping all around me as if I weren't even there.

You can't really prove it by me about the early morning time because I am not an early morning person.

I see them all day but mostly early morning and early evening but like mimidi I've been seeing then all day fighting chasing doing the pendulum dance. Sarah

I only see them in the early morn and late afternoon. To hot here by 11am. Sometimes they even feed in the dark, but not often.
Teri

The hummies are up and about early out here. My bedroom window faces the back yard and I can hear them even before the sun comes up!!! I love listening to them!!!

I also have feeders on the east side of the house (which gets lots of indirect sunlight but very little directly because the neighbor's house casts a morning shadow). Considering our temperatures are over 100 degrees most days the hummies tend to stay on that side of the house feeding. They zip back and forth from the backyard trees to all the feeders I have hanging from trellises on the east side and onto the front yard trees. I can find them perched on the trellises guarding their feeders most any time of the day...or perched out on a limb of one of the big oaks keeping tabs on their feeders.

They also make a bee line straight across the street to the opposite neighbor's yard - there is a campsis radicans blooming that the hummies love to frequent.

So pretty much I get hummie activity from pre-dawn to about 9 o'clock at night. As long as there's flowers and feeders they stick around. They also nest in the big oak trees in my yard.

~ Cat