Where are the Hummers?

I'm so disappointed. My garden is full of blossoming Lantana and two feeders full of fresh nectar. It's 80 degrees and sunny. Where have all the hummingbirds gone? I occasionally see them flying through the yard, and sometimes they stop to check out the Lantana. But they don't want to try my feeders at all. These Arizona hummers are all snobs- they loved my feeders back in North Carolina! Yet my feeders here stand full, untouched. But I will not be deterred. I will continue to woo them with my fresh nectar and possibly some new feeders.