Feather-legged Fly (Trichopoda, Tachinidae, Diptera) - maybe Trichopoda subdivisa? - on non-native Fennel (Foeniculum vulgare, Apiaceae)
This is a remarkable Feather-legged Fly (genus Trichopoda) in the family Tachinidae of the order Diptera - maybe species Trichopoda subdivisa? You can see the feathery wings on its rear legs. It's working flowers of non-native Fennel (Foeniculum vulgare) in the Apiaceae plant family on the mostly-dry river bed of the Santa Ynez River. It has really large "calypters". Compare the photos at BugGuide. See my [previous] photo. (Paradise, Santa Ynez River, 19 September 2012)
Fennel is a bad weed in our mountains, but the native insects seem to like it.