My hummingbirds seem to have disappeared. I don't know if it is all the rain we've been having or the new syrup I put in the feeder. It was a concentrate and perhaps I did not mix it correctly. I miss them!
I mix my own food for the hummers and change the feeders every other day...one part sugar to 4 parts water. I boil about 2 cups of the water, dissolve the sugar, and use cold water for the rest to fill a 2 quart container. That way, it is usable right away.