Galls on twigs of a grey box. The galls are about 4mm wide on twigs about 1mm wide, and light green underneath. There were several groups like the one shown on the same waist high sapling. The largest group about 100mm across. Most of the stunted leaves attached to the galled twigs had conical galls on the underside, about 1.5mm high (see third photo). These appear to be associated since they do not appear anywhere else on the sapling.
The first photo shows some lerps and what I assume is a psylid nymph. Psylid nymphs except for the first stage crawlers should not normally be seen but I read that sometimes they move to a different location to feed, which would make sense since the leaf seems to be quite badly damaged. Other photos show what appear to be newly emerged adults on the same red gum sapling. I assume the orange ones (about 2mm long) are female and the tiny black ones (about 0.5mm) male, but this is just a guess they could be something completely different. There were masses of lerps on this sapling and most still had nymphs in them when the photos were taken
Matches all points of description in Flora of Victoria (online), except that sepals are 7mm long versus max 4mm in description. (Fine hairs on sepals are too small to see in photo, but were examined under microscope.) Have not examined taproot or seed. Measured several stems to 1.8m but they may be longer as I could not get to the base of the plant.
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.
Gall caused by a rust fungus, about 10cm across, on a large Acacia Mearnsii.
Update: Uromycladium tepperianum has been split into at least 16 different species each infecting a different range of Acacia species. The one on Acacia mearnsii is called Uromycladium murphyi. See "Diversity of gall-forming rusts (Uromycladium, Pucciniales) on Acacia in Australia" by C. Doungsa-ard et al, Persoonia vol. 40, 2018 pages 221–238.
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.
These are bud galls on Black Wattle, which I believe are caused by Dasineura rubiformis. The species is described in Kolesik, P., Adair, R.J., and Eick, G (2005) "Nine new species of Dasineura (Diptera: Cecidomyiidae) from flowers of Australian Acacia (Mimosaceae)", Systematic Entomology 30:454-479. You can find photos on the web from south africa and portugal since this species has been released for biological control of black wattle. It was found not to affect the growth of plantation trees, but drastically reduces seed production and therefore invasiveness. Species is fairly common in Woodlands Historic Park.
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.
There were large numbers of these very small beetles on the Myoporum insulare on Providence Road adjacent to Woodlands Historic Park. (These were planted by the council and do not occur in the Park.) I believe the enlarged hind femur identifies it as a flea beetle, tribe Alticini, which narrows it down to one of 232 species according to AFD
Colony of Red-line Gumtree Hoppers at the base of a ca. 7 year old Yellow Box (approx 10cm trunk diameter). There were also a few individuals and pairs dispersed on a low branch. There were no ants in attendance so it appears the bugs are not feeding, but they must be at least preparing to mate. The male in the second photo is holding onto the female with his middle legs while vibrating his front and backs legs, usually not touching the female. Many pairs in the main group were behaving in a similar way with varying degrees of contact. In one pair the male had his hind legs stationary but was stroking the "face" of the female with his front legs.
Seems to be feeding on a Yellow Box leaf. After wading through 500+ Pentatomidae photos on Bowerbird the only match I could find was http://www.bowerbird.org.au/observations/88269. According to the post Acanthosomatidae differs from Pentatomidae in having 2 instead of 3 tarsal segments but I don't think you can see that in my crappy photo.
Larval food plants are in the citrus family and do not exist in the park. I have previously seen the species mating at the Gellibrand Hill summit, and I assume this one next to Providence Road was there for the same purpose. I may have seen one in exactly the same spot last year. Presumably it is the closest place to someones Lemon tree that matches the criteria for a mating site.
In the vegie patch at the Woodlands Historic Park office. Larval food plants in the Urticaceae family - the only extant plant in the park is the weed Small Nettle. Not sure what was of interest in the vegie patch, don't think they are growing any nettles.