The Mesquite Trees are in their second bloom of the year and the trees are frequented by butterflies and bees collecting nectar and pollen.These are the same butterflies that are coming to the creosote and the red bird of paradise bushes. I've tried to identify them. I believe they're Cloudless Sulphurs. I'd be delighted if someone would confirm that or correct me if they're something else.
Other posts on Tortoise Trail about mesquite: