Should New Zealanders kill their kittens to save their native birds?

Domestic cats are furry murderers, argues a New Zealand businessman who is spearheading a campaign to get his fellow Kiwis to give them up.

'Save a Kaka, kill your cat' is the message of New Zealand businessman Gareth Morgan, who has started a campaign to rid the ecologically isolated islands of murderous felines in attempt to stem the dwindling numbers of native birds.

For 80 million years, the archipelago has been separated by ocean from any other land. Apart from one mouse-sized animal which went extinct around 16 million years ago, there have never been any land mammals on the islands (although there remain two species of native bat, and plenty of whales, dolphins and seals). That left an ecological niche which was largely filled by birds, being some of the few animals which could reach the islands after the seas split them from the rest of Gondwanaland.

New Zealand has some of the most unique, and clueless, birds in the world. The Kakapo is a giant green parrot which eats grass and has sex with Stephen Fry's head. The Kiwi is the size of a chicken, and lays an egg so big that the female, for the last couple of days of her incubation, has no room for any food in her stomach and must fast. The Kokako is a semi-flightless bird which sings duets in breeding pairs for hours on end and occupies the same niche as a flying squirrel.

None of them were ever exposed to predatory land mammals until the Maori arrived in the 14th century, and so they have very few natural defences against them. The introduction of mice and rats was bad enough, but once cats appeared, it was nearly over. The Kakapo and Kiwi are now critically endangered species, each limited to a few islands which have been cleared of introduced predators — but there's hope for the Kokako, as well as the Kaka and Weka which are also under threat. And one thing which would help is New Zealanders giving up their cats.

Gareth Morgan has started a campaign, Cats to Go, which is pushing for that aim. He writes:

New Zealand is the last refuge of a huge range of bird species, we’re famous for our claim to be clean and green, and some of us have recognised the huge economic benefit, let alone the ecological dividend, from achieving a Predator Free New Zealand.

But the vision is flawed. Almost half of Kiwi households have a cat (or two) making New Zealanders the world’s biggest cat owners. Cats are incredibly effective hunters and are wiping out our native birds.

… Like the parent of a bully saying that their little Johnny would not behave like that, if you’re a cat owner reading this, you are probably thinking that the above statistics don’t apply to your cat. The fact is that your furry friend is actually a friendly neighbourhood serial killer.

He doesn't actually want people to kill their cats directly — though he emphasises that "that is an option" — instead proposing that people put bells on their cats to warn birds, keep them inside, get them neutered, and, above all, not replace them when they die.

Even if it works, there is a long way to go to make New Zealand safe for its native birds. Rats, mice and possums are all widespread and causing damage of their own. But a cat-free New Zealand might still be worth fighting for.

New Zealand's killer kittens. Photograph: Cats to Go

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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In the row over public sector pay, don't forget that Theresa May is no longer in charge

Downing Street's view on public sector pay is just that – Conservative MPs pull the strings now.

One important detail of Theresa May’s deal with the Democratic Unionist Party went unnoticed – that it was not May, but the Conservatives’ Chief Whip, Gavin Williamson, who signed the accord, alongside his opposite number, the DUP MP Jeffrey Donaldson.

That highlighted two things: firstly that the Conservative Party is already planning for life after May. The deal runs for two years and is bound to the party, not the leadership of Theresa May. The second is that while May is the Prime Minister, it is the Conservative Party that runs the show.

That’s an important thing to remember about today’s confusion about whether or not the government will end the freeze in public sector pay, where raises have been capped at one per cent since 2012 and have effectively been frozen in real terms since the financial crisis.

Michael Fallon, the Defence Secretary, signalled that the government could end the freeze, as did Chris Grayling, the Transport Secretary. (For what it’s worth, Gavin Barwell, now Theresa May’s chief of staff, said before he took up the post that he thought anger at the freeze contributed to the election result.)

In terms of the government’s deficit target, it’s worth remembering that they can very easily meet Philip Hammond’s timetable and increase public sector pay in line with inflation. They have around £30bn worth of extra wriggle room in this year alone, and ending the pay cap would cost about £4.1bn.

So the Conservatives don’t even have to U-turn on their overall target if they want to scrap the pay freeze.

And yet Downing Street has said that the freeze remains in place for the present, while the Treasury is also unenthusiastic about the move. Which in the world before 8 June would have been the end of it.

But the important thing to remember about the government now is effectively the only minister who isn’t unsackable is the Prime Minister. What matters is the mood, firstly of the Cabinet and of the Conservative parliamentary party.

Among Conservative MPs, there are three big areas that, regardless of who is in charge, will have to change. The first is that they will never go into an election again in which teachers and parents are angry and worried about cuts to school funding – in other words, more money for schools. The second is that the relationship with doctors needs to be repaired and reset – in other words, more money for hospitals.

The government can just about do all of those things within Hammond’s more expansive target. And regardless of what Hammond stood up and said last year, what matters a lot more than any Downing Street statement or Treasury feeling is the mood of Conservative MPs. It is they, not May, that pulls the strings now.

Stephen Bush is special correspondent at the New Statesman. His daily briefing, Morning Call, provides a quick and essential guide to domestic and global politics.

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