THE ivory-billed woodpecker is not large, as birds go: It is about the size of a crow, but flashier, its claim to fame is that, though it had been thought extinct since 1944, a lone kayaker spotted it about two years ago, flying around among the cypress trees in the Cache River National Wildlife Refuge. And that sighting may prove the death-blow to a $319m irrigation project in the Arkansas corner of the Delta.

The Grand Prairie Area Demonstration Project seemed, at first, a fine idea. The Grand Prairie is the fourth-largest rice-bowl in the world, with 363,000 acres under paddies. But it is running out of water, with farmers driving wells deeper and deeper into the underlying aquifer. The new project, dreamed up around a decade ago, would tap excess water from the White river when it floods and pumps it, at the rate of about one billion gallons a day, to storage tanks on around 1000 rice farms.

Unfortunately, it would also divert water from the region's huge, swampy wildlife refuges, home to black bears and alligators and the pallid sturgeon. Tiny swamp towns like Clarendon and Brinkley, which are heavily black and almost destitute, rely on nature tourism for the little economic activity they have. In Brinkley, the barber offers an "ivorybill" haircut that makes you look like one.

The project has some powerful local backers. They include Blanche Lincoln, the state's senior senator, who grew up on a rice farm in Helena, and Dale Bumpers, a former four-term senator and governor of Arkansas. Mr. Bumpers, long an icon of the environmental movement and prominent in the efforts to establish the refuges, now believes the water project is important for national security in food and trade, and that it will not damage the forests he has worked to protect.

Opponents worry that the project, apart from its environmental risks, will overwhelm the innovative water conservation methods that rice-farmers are already using, and give the biggest water users an unfair advantage. They also object that it means using subsidised pumps to provide subsidised water for a crop that doesn't pay. Rice is one of the most heavily assisted crops in America; rice payments cost taxpayers almost $10 billion between 1995 and 2004, and rich farmers round Stuttgart in Arkansas County (an efficient and politically shrewd group) took in $21.2m in subsidies in 2004 alone.

It can be inferred from the first paragraph that ______.

A．an ivory-billed woodpecker was shot by a lone kayaker two years ago.

B．the ivory-billed woodpecker was accustomed to living among cypress trees.

C．the irrigation project is probably broken off by the ivory-billed woodpecker.

D．the appearance of the ivory-billed woodpecker may make the irrigation project terminated.