A collection of web links to local guides for identification.
Only just started this list, so it's likely to be updated and changed in the coming weeks!

Frogs of the Greater Sydney Region Identification Guide booklet
Owner: NSW Local Land Services
Document dated 2023; accessed 28/12/2023
https://www.lls.nsw.gov.au/__data/assets/pdf_file/0004/1479532/Frogs-of-the-Greater-Sydney-Region.pdf

Frogs of Sydney poster
Owner: Frog and Tadpole Study Group NSW (FATS)
Document undated; accessed 28/12/2023
https://www.fats.org.au/images/Publications/frogs-of-sydney.pdf

Local Land Services
Collection of Natural Resource Management brochures / PDF downloads for the Murray Region, NSW
Mammals, Insects, Trees, Fungi, Native Plants (to this region)
https://www.lls.nsw.gov.au/regions/murray/articles,-plans-and-publications/publications

This list is for high-level IDing of "Unknown" and your own observations. :)
NOTE: this is a Work In Progress - terminology is potentially incorrect, typos, and changes/updates/corrections likely
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Random reminders... :)
Purple plant at Brisbane on the curvy arbor: Bougainvillea
Sticky flowering plant Heidi got from neighbour's garden when cat-seeking: Plumbagos
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Overview of main Taxonomy Tree levels

Kingdom

• Animals
• Plants
• Fungi & Lichens
• Protista
• Archaea
• Bacteria

Phylum

Class

Order

Family

Tribe

Genus

Species

• Plants
• Palms
• Ferns
• Flowering Plant
• Grasses Sedges & etc
• Eucalypts
• Myrtace Family
• Daisy Family
• Orchids

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• Arthropods (millipede, spiders, insects) - Phylum: Arthropoda
• Arachnids - Class: Arachnida
• Spiders - Order: Araneae
  
  
• Insects - Class: Insecta
• Winged / once winged insects (anything with wings & 6 legs - moths, butterflies, grasshoppers, flies, crickets, mozzies, beetles, cockroach, ants) - Subclass: Pterygota
• Butterflies & Moths (including caterpillar, cocoons, pupas) - Order: Lepidoptera
• Bees, Wasps, Ants - Order: Hymenoptera
• Flies - Order: Diptera
• Crickets, Grasshoppers, Katidids - Order: Orthoptera
• Stick Insects - Order: Phasmida
• Mantises - Order: Mantodea
• Dragonflies & Damselflies - Order: Odonata

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• Fish (Eels, rays, sharks, dolphins, whales) - Class: Actinopterygii
• Snails, slugs - Class: Gastropoda

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• Earthworms and Allies - Subclass: Oligochaeta

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• Reptiles (lizards, skinks, snakes, frogs) - Class: Reptilia
• Snakes & Lizards - Order: Squamata
• Turtles & Tortoises - Order Testudines
• Frogs & Toads - Order: Anura

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• Mammals (Quolls, Numbats, Possums, Bilbies, Bandicoots, Platypus, Echidnas, Humans) - Class: Mammalia
• Kangaroos, Wallabies, Possums, Wombats, Gliders - Order: Diprotodontia
• Bats & flying foxes - Order: Chiroptera
• Mice, Rats, Squirrels, Hamptsers, Guinea Pigs - Order: Rodentia
• Rabbits & Hares - Family: Leporidae

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• Birds - Class: Aves
• Owls - Order: Strigiformes
• Hawks, Kites, Eagles - Order: Accipitriformes
• Perching birds - Order: Passeriformes
• Water birds (ducks, geese, swans) - Order: Anseriformes
• Parrots - Order: Psittaciformes

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A semi-planned adventure, exploring a section of the Castlereagh Nature Reserve. I had been expecting sand, but the sticky red clay mud was all I came across. Several sections of track are flooded and other areas are too muddy to pass safely.

With some knowledge from previous walks, I was able to actually identify some of the plants I saw! :) The highlights for this adventure would have to be the kangaroo (or wallaby or wallaroo) track and also the green grevillea. The flowers blended in so much that I noticed them as I was taking the photos, a wonderful surprise. :)

A guided walk around the reserve, learning about the flora, fauna and the history of the area.
With the recent rain, the area was very green and lovely to walk through. The platypus are long gone, and the water dragons were still in bed - their sunning rock currently amassed with green moss and lichens.

Returning partway along the track, we spotted tiny flowering helmet orchids. Their cute heart-shaped leaves and dark coloured hoods, we had walked straight past them without even realising they were there! As our guide was about to head off I called her over and we all spent time admiring these little bubbies.

Further along, I spotted more tiny orchids in flower. After taking a few photos, I excitedly turned around to show the group but for one heart-stopping moment I realised I was all by myself! Luckily it was a bend in the track and I quickly caught back up with them. :)

Admiring the beautiful ferns as we walked up past the multi-layered sandstone, we headed back up to the park and out into the sunshine.

A guided walk for beginner birdwatchers (aka "bird listeners", lol).
Not very successful in photographing the birds, and I certainly need more practice with binoculars. It was enjoyable being in a group learning about and seeing the migration of birds. With some bonus animal traces including koala tracks and poop!

A fun afternoon of getting distracted, random tangents and many exclamations of "oooo look at this!". :)

Even though some sections of the walk were too wet to explore, we got lucky with the weather - not too hot, not too windy and no rain. A lovely group of people all enjoying the reserve and happily pointing out special things for everyone to enjoy. This included a kookaburra, a bowerbird, wrens, bell birds, insects and various features of the many plants surrounding us. Our guide for this walk was Jennifer.

I knew there was one manmade lake area near the entrance, but I found a few more scattered in the grounds. Still figuring out best method for capturing photos of the ever-moving dragonflies... today I tried video and also continuous shoot - the latter worked better (assuming you have camera at the correct angle so that the subject is actually in the frame).
Finding the black swans was a beautiful surprise! :)

It was a spontaneous exploration... I happened to have a hat, sunglasses and my camera, but alas, no sunscreen (again).

I was only expecting to find three or four different specimens... :)

A plan to go to the Botanic Gardens and use a voucher at the nursery turned into an adventure! Not only driving there (because of train trackwork), but also finding a field of flowers at the garden for springtime.
So many butterflies and other little critters to observe. Particularly fussy about it's choice of flowers, I did eventually manage to snap a couple of photos of the Monarch Butterfly. :)

Remembered my camera, hat and lunch, but forgot sunscreen. oops...