Very young Australian Cockroach nymph getting between the outer bracts of the unopened flower head. Ants do the same thing so there must be some food down there, although I don't know why there would be.
More bud galls on Black Wattle. I have only seen this sort once. I think they might be caused by Asphondylia glabrigerminis. Species is described in P Kolesik, RJ Adair, G Eick (2010) "Six new species of Asphondylia (Diptera:Cecidomyiidae) damaging flower buds and fruit of Australian Acacia (Mimosaceae", Systematic Entomology 35:250–267.
There are some poorly reproduced photos in Adair, R.J., Burgess, T., Serdani, M. and Barber, P. (2009) Fungal associations in Asphondylia (Diptera: Cecidomyiidae) galls from Australia and South Africa: implications for biological control of invasive acacias. Fungal Ecology, 2 (3). pp. 121-134.
Female galls on Yellow Box. Counted at least 40 on a 2m high sapling. Almost all straight sided, just a few more bulbous. The longest was 20mm. Bulbous gall in the photo is 16mm long and about 6mm diameter.