Now, I'm no scientist and these are not altogether common critters so I have asked for help identifying them and I hope the names are correct. Each fly name is hyperlinked to further information in external websites.
Owl fly - Neuoptera, family Ascalaphidae
Location: near Gulgong, NSW
Drone Fly - Eristalinus species, family Syrphidae
Location: Girrahweem Park, Earlwood
Unknown Hover fly
Location: Turrella Reserve, Earlwood
Common Hover fly - Syrphidae
Location - Wolli Creek Valley
Location: Marrickville NSW, on the tip of some rosemary.
Snail Parasite blowfly - Amenia imperialis
Location: near Gulgong, NSW
Flesh fly - Sarcophigidae
Location Turrella Reserve, Earlwood
Location: Marrickville, NSW
Long-legged fly - Austrosciapus connexus
Location: Turrella Reserve, Earlwood
Location: Marrickville, NSW
Walnut husk fly - Diptera: Tephritidae
Location: Marrickville, NSW
Unknown striped fly
Location: Botannic Gardens, Sydney
Location: Marrickville, NSW
Unknown shiny fly on a creek bank
Location: near Gulgong, NSW
Spotted fly
Location: Marrickville NSW
Location: on curry plant, Marrickville, NSW
Bright-eyed fly
Location: Marrickville, NSW
See also:
Fruit flies