Region
- United States 21 results
- New Zealand 18 results
- Canada 7 results
- Great Britain 5 results
- Christchurch 4 results
- Australia 3 results
- Heathcote and Avon Estuary 3 results
- Heathcote and Avon Estuary (N.Z.) 3 results
- Asia 2 results
- Fiji 2 results
- Oceania 2 results
- Africa 1 results
- Avon River/Ōtakaro 1 results
- California 1 results
- Cold regions 1 results
- Developing countries 1 results
- East Asia 1 results
- Europe 1 results
- Heathcote River 1 results
- New Caledonia 1 results
- New South Wales 1 results
- North America 1 results
- Outer space 1 results
- South Island 1 results
- Taiwan 1 results
- Tennessee River Valley 1 results
- Wisconsin 1 results