I'm thinking the garden name should have Dragonfly in it somewhere. When I went out for a mid-day walk around the garden I counted over 25 dragonflies. I'm not sure where they all perched when there was nothing but grass and foundation plants here.
I think these are all the same species (male and female and/or juvenile) but I have noticed quite a lot of different species and sizes and colors as the summer progresses. Dragonflies are predators and while they might take some of the butterflies I'm working to attract they will also take some of the mosquitoes I'd like to avoid so they're welcome.
Dragonfly on seed pop of Butterfly Weed (Asclepias tuberosa)
Dragonfly on cut end of Bronze Fennel (Foeniculum vulgare)