No. It is in Canberra's CBD. On Tuesday evening landscape architects Renae Palmer and Carma Sweet were reconnoitring the areas that they and others planned to use for Mending the Urban Fabric installations. They came across the little urban blemish of a missing tile and it suggested to them a mini-rock face. They went to work to create this exquisite little installation they've called The Abseilers.

The Mending the Urban Fabric project is part of the Design Canberra Festival running from November 20 to 23. The organisers explain: "The fabric of our garden city rips and bulges in places where it is stressed, forming cracks and holes in our roads and footpaths. Landscape architects of the Canberra region will mend the urban fabric by creating small, temporary interventions in cracks and pot holes around the city, filling and reinterpreting them using ephemeral materials."

Most of the head-turning "temporary interventions" - all done by members of the Australian Institute of Landscape Architects - are along Lonsdale Street in Braddon, at nearby Genge Street in the city and in a Civic laneway next to Gus's cafe.

Surgical "interventions" - and after this the cracks we see in pavements will never seem quite the same again - include (our picture) Jennie Curtis's colourful suturing of a nasty wound in the CBD's fabric/flesh.

In other mendings and improvements of the fabric, Barbara Payne looked for and found cracks, holes and blemishes into which she has introduced beautiful native grasses. She explains that they are all species (such as wallaby grass and lemon beauty heads) that once upholstered these very spots - before a city replaced the grassy plain.

This use of today's built-up Canberra places of local native grasses reminds me of an essay I once wrote, with the help of many natural history experts, about what would become of Canberra if humans abandoned it. At the time, abandoned Chernobyl was being vigorously recolonised by its region's fauna and flora. One day we may have a similar disaster here. Or perhaps, admitting our awful mistake in not building the federal capital city at Dalgety, we may abandon Canberra and begin again at that dream site beside the Snowy River.

My experts were sure that because Canberra is so bush-encompassed, our fauna and flora would be very quick to swarm back over the city and suburbia. Opportunistic native grasses, their seeds flung about by breezes, would colonise nooks and crannies. Wombats, lizards, bats and bush rats would at last take their rightful places in crumbling Parliament House and in the decaying chamber of the ACT Legislative Assembly, bringing hitherto unknown ethical standards to those habitats.

Yes, a people-abandoned Canberra would liberate some animal species (wombats to Parliament!), but what would it mean for the gang-gang cockatoos?

We mention them for the zillionth time this year because this Thursday is the first day of the week-long gang-gang cockatoo survey quarterly muster. This latest citizen-scientist muster (the Canberra Ornithologists Group asks you to closely monitor the gang-gangs in a place you know well) is especially important.

We are into the seasonal spell when this adorable species has breeding on its mind. A main aim of this year's survey is to find out at last whether any fowls of this mysterious species nest (in holes in old trees) in the city. No one has yet proved that they do.Instead they seem to bustle off to to the mountains to do this. But if any are doing it here, then now is the time to dream of making breakthrough findings. If you have gang-gangs in your bailiwick, you may see and hear them engaging in courtship and even (blush) copulation.

You may also see them taking a keen interest in hollows in trees. Butr so far, few if any gang-gang twitchers have ever seen this suburban hollow inspection blossom into nest-making. Gang-gangs may peer into holes in trees just because they are intelligent and because, as for us, nooks and crannies are intrinsically interesting.

Citizen-science twitchers, awake! Find out all everything you need to know about our dear faunal emblem so you can help with the muster, at canberrabirds.org.

For specific gang-gang queries, email ggquery@canberrabirds.org.