These guys are able to change colour from bright to dark green (almost brown). I suspect it’s probably due to background and lighting, as one I kept in a dark bag for a short time did that.
The half wine barrel of water placed near your elkhorns sounds great and would definitely help to retain frogs. As the LGFs apparently breed in moving water you can probably expect them to disappear in late winter and spring. Other species, such the Dwarf Sedge frog
L. fallax will possily breed in that volume of water if you include some emergent plants. Broader leaved emergent are better but not essential. I’d recommend to keep them in pots so they don’t take over. I actually grew some transplanted bulrushes in 90 mm pots this way. Periodically trimming the roots as they emerge from holes in the pots helps keep them under control and assists in maintaining water quality by removing a percentage of the organic matter. I have also used duckweed, a tiny floating plant, to help maintain water quality. When it builds up, scoop most of it out with an aquarium net - makes for excellent compost or mulch. Actually Bunnings have a reasonable selection of aquatic emergent plants, including the native fern Nardoo.
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just out of curiosity, what other species did you find around there?
In a previous thread we outlined the more common lizards and snakes found in your area. In terms of ground frogs,
Pseudophryne australis was the most common and also my personal favourite. There was also the occasional
P. bibronii and
Crinea signifera. The most common tree frogs were
Litoria fallax and then
L. aurea, invariably located in the vicinity of water. There was also the odd
L. dentata,
L. peronii, what we used to call the ‘Brown Tree frog’, which I think was
L. verreauxi and
L. caerulea. Apart from the Leaf Green tree frog I think there were a couple more but am not sure what species
Something like Frogs and Reptiles of the Sydney Region by Ken Griffiths for $25 would probably be a good investment. Someone might like to comment here because I have never had the opportunity to have a look at the book.