My reference here is "A field guide to insects in Australia" by Paul Zborowski and Ross Storey.
Family Asilidae (Robber Flies):
Small to large hunting flies. Some genera such as Blepharotes are among the largest flies with a wingspan of up to 75mm. They are hairy flies with a bearded face and a stout pointed (piercing) proboscis. Robber flies are active predators catching other insects on the wing.
Tachinid Senostoma sp:
Species of Senostoma have long spindly legs and elongated mouth parts. They are often found on flowers. All the larvae in the Tachinidae family are parisitic on other insects.
My reference below is "Backyard Insects" by Paul Horne and Denis Crawford
Family Bibionidae (maybe):
Short antennae below the eyes and spines on the front tibiae.
Family Tephritidae (Fruit Flies) - maybe:
There are over 4500 species world wide. Not all Tephritid larvae feed in fruit. Some are leaf miners gall formers or scavengers and others can be found in places such as rotting wood termite mounds and young plant shoots.
