Trips with New Zealand's Department of Conservation (DOC) to see rare species in isolated places are being auctioned online on Sunday to raise money for a conservation charity.

Million Dollar Mouse, a charity associated with Wellington businessman Gareth Morgan, is running the auctions on TradeMe, the auction website founded by his son Sam Morgan.

The charity is raising $1 million to eradicate mice on the Antipodes Islands, 800 kilometres southeast of New Zealand, so birds can flourish there.

Bids for an eight-day trip to Snares and Codfish islands in December have reached $3000. Tourists are not usually allowed on the islands.

"You will work with a small DOC team to catch and transfer the endangered Snares Island snipe, as well as assist with a range of other tasks," the auction description says.

A moderate standard of fitness is required.

Other trips include Kakapo chick rearing, a seven-day trip to Resolution Island in Dusky Sound, Fiordland, and a "ranger for a day" on Kapiti Island.