Ten years ago we sat with a good pal, now deceased, and his wife on the porch of his golf club, sipping after-dinner single malts and smoking Cubans. And watching the Hummingbird Moths who were all over the solid planting of pink Cleome below the porch.
One of those magical moments. There are other reasons to plant annuals like Cleome, but those moths at dusk are the best reason. Here's a pic of one from Gardener's Index hovering over a Cleome: