Below are a few photos taken in the back garden today.
Note. After further investigation I actually think it's an Emperor Dragonfly Anax imperator. More on this dragonfly here.
A Red-tailed Bumblebee Bombus lapidarius on its way from one California Poppy Eschscholzia californica to another.
A Yellow-legged Mining Bee Andrena flavipe on an Oxeye Daisy Leucanthemum vulgare.
And a Colletes sp. According to Obsidentify it is either C. daviesanus/fodiens or similis.
And a Marmalade Hoverfly Episyrphus balteatus
And on this Oxeye Daisy Leucanthemum vulgare was a male Long Hoverfly Sphaerophoria scripta.
And on another Oxeye Daisy was a another Sphaerophoria species. As to which one I'm not sure.