We were clambering over a bank that was thickly covered with ferns and rotten tree trunks, and which led down into a wide, shallow gully in the middle of which Ron was standing, looking perplexedly around him. Gaynor lost her footing as she negotiated the muddy slope into the gully, and slithered down it elegantly on her bottom. I got my camera strap caught in the only branch that didn't break off the moment you touched it. Mark stopped to help me disentangle myself. Ron had gone into bounding mode again and was hopping up the far side of the gully calling out for Arab.

`Can you see them?' Mark called out.

A thought struck me. We were lost because Boss's bell had stopped ringing. The same thought obviously hit Mark simultaneously and we both suddenly called out, `Have they got a kakapo?

A call came back.

Gaynor turned to us and shouted, `They've got a kakapo!'

Suddenly we were all in rumbustious bounding mode. With much shouting and hallooing we clambered and slithered our way hectically across the floor of the gully, hauled ourselves up the other side and down into the next gully, on the far side of which, sitting on a mossy bank in front of a steep slope, was a most peculiar tableau.

It took me a moment or two to work out what it was that the scene so closely resembled, and when I realised, I stopped for a moment and then approached more circumspectly.

It was like a Madonna and Child.

Arab was sitting cross-legged on the mossy bank, his long wet grizzled beard flowing into his lap. And cradled in his arms, nuzzling gently into his beard, was a large, fat, bedraggled green parrot. Standing by them in quiet attendance, looking at them intently with his head cocked on one side, was Boss, still tightly muzzled.

Duly hushed, we went up to them. Mark was making quiet groaning noises in the back of his throat.

The bird was very quiet and quite still. It didn't appear to be alarmed, but then neither did it appear to be particularly aware of what was happening. The gaze of its large black expressionless eye was fixed somewhere in the middle distance. It was holding, lightly but firmly in its bill, the forefinger of Arab's right hand, down which a trickle of blood was flowing, and this seemed to have a calming effect on the bird. Gently, Arab tried to remove it, but the kakapo liked it, and eventually Arab let it stay there. A little more blood flowed down Arab's hand, mingling with the rain water with which everything was sodden.

To my right, Mark was murmuring about what an honour it would be to be bitten by a kakapo, which was a point of view I could scarcely understand, but I let it pass.

We asked Arab where he'd found it.

`The dog found it,' he said. `Probably about ten yards up this hill, I'd say, under that leaning tree. And when the dog got close it broke and ran down to just here where I caught it.

`It's in good condition, though. You can tell that it's close to booming this year because of its spongy chest. That's good news. It means it's establishing itself well after being resettled.'

The kakapo shifted itself very slightly in Arab's lap, and pushed its face closer into his beard. Arab stroked its damped ruffled feathers very gently.

'It's a bit nervous,' he said. `Especially of noise probably more than anything. He looks very bedraggled because of being wet. When Boss first caught up with him he would have been in a dry roost up there and probably at the noise of the bell or the dog going too close, the bird broke out and ran down the hill, and was still going when I caught it. It's just gripping me a bit and that's all. If he wanted to put the pressure on... ' He shrugged. The kakapo clearly had a very powerful bill. It looked like a great horn-plated tin opener welded to its face.

`It's definitely not as relaxed as a lot of birds,' muttered Arab. 'A lot of birds are really relaxed when you've got them in the hand. I don't want to hold it for too long since it's wet and will get chilled through if the water penetrates to the skin. I think I'd better let it go now.'

We stood back. Carefully, Arab leant forward with the bird, whose big powerful claws stretched out and scrabbled for the ground even before it got there. At last it let go of Arab's finger, steadied its weight on the ground, put its head down and scuttled off.

That night in the wardens' but we jubilantly polished off the remaining beers, and pored, over the records of all the kakapos that had been transferred to Codfish. Arab had made a note of the identity number of the bird, which had been fastened to its leg - 8-44263. Its name was Ralph. It had been transferred to Codfish Island from Pegasus Harbour, Stewart Island, almost exactly a year ago.

`This is excellent news,' exclaimed Ron. `This is really very, very good news indeed. If this kakapo is coming up to booming condition just a year after being relocated, it's the best indication we've had yet that the transfer programme is working. You know that we didn't want you to come here, and that we didn't want to track kakapos and risk disturbing them, but as it happens... Well, this is very useful information, and very encouraging indeed.'

A few days later, standing on top of Kakapo Castle in Fiordland we tell Don Merton that we think we've been forgiven.

`Oh yes, I think so,' he says. `You may have bumbled around a bit and trodden on a few toes, but you've actually stirred things up a bit as well. The press conference was very effective, and from what I hear there's an imminent decision coming from quite high up to move the kakapo conservation programme to the top of the Department's priority list, which should mean that we get allocated more resources. I just hope it's not all too late.

`There are now twenty-five kakapos on Codfish, but only five of those are females, and that's the crucial point. There's only one kakapo that we know of left on Stewart Island, and that's a male. We keep searching for more females, but we doubt if there are any more. Add those to the fourteen birds on Little Barrier and we have a total of only forty kakapos left altogether.

`And it's so difficult getting the blighters to breed. In the past they bred very slowly because there was nothing else to keep their population stable. If an animal population rises so fast that it outgrows the capacity of its habitat to feed and sustain it then it plunges right back down again, then back up, back down and so on. If a population fluctuates too wildly it doesn't take much of a disaster to tip the species over the edge into extinction. So all the kakapo's peculiar mating habits are just a survival technique as much as anything else. But only because there was no outside competition. Now that they are surrounded by predators there's very little to keep them alive, other than our direct intervention. As long as we can sustain it.'

This reminds me of my motorbike industry analogy, which I have tactfully kept to myself. There are remedies available to motorbike engineers that zoologists do not have. As we tread our way carefully back along the ridge to the helicopter I ask Don what he feels the long term prospects for the kakapos really are, and his answer is surprisingly apposite.

'Well,' he says in his quiet polite voice, `anything's possible, and with genetic engineering, who knows. If we can keep them going during our lifespan, it's over to the next generation with its new range of tools and techniques and science to take it from there. All we can do is perpetuate them during our lifetime and try to hand them on in as good a condition as possible to the next generation and hope like heck that they feel the same way about them as we do.'

A few minutes later our helicopter rises up above Kakapo Castle, puts its nose down and heads back up the valleys to Milford Sound, leaving behind a small scratched depression in the earth and a single, elderly untouched sweet potato.