NzHerald looks at Peters' previous diplomacy in north korea:
New Zealand Herald When Winston Peters was last in North Korea he tried to get the country to give up its nuclear aspirations but instead came away with a bird-watching agreement.[snip]
Visits by bird conservationists to North Korea remained closed until Peters' 2007 visit. After being approached by Kiwi bird lovers, Peters raised the issue with North Korea officials who confirmed they would accept delegations from New Zealand.
The first was made in 2009, with three Kiwi bird enthusiasts completing a survey that provided the first shorebird information from North Korea. More visits have been made since then to count and watch birds
The birds migrate from Korea to NZ.