Your general assessment of trends is correct. Most populations are increasing. There is current assessment that separates the North Island birds from the others but that is not recognised in the New Zealand checklist.
Trewick, S. A., Pilkington, S., Shepherd, L. D., Gibb, G. C., Morgan-Richards, M. (2017). Closing the gap: Avian lineage splits at a young, narrow seaway imply a protracted history of mixed
population response. Molecular Ecology 26(20), 5752–5772.
Your map overstates the distribution. There are not populations on the mainland around “Auckland” and the area to the north of Auckland is generally restricted to the southern half of the drawn extent. More importantly , there are essentially no weka on most of Stewart Island (most southern island). All of the weka there are on very small islands offshore. Your extent of occurrence may need to be altered accordingly.
Your general assessment of trends is correct. Most populations are increasing. There is current assessment that separates the North Island birds from the others but that is not recognised in the New Zealand checklist.
Trewick, S. A., Pilkington, S., Shepherd, L. D., Gibb, G. C., Morgan-Richards, M. (2017). Closing the gap: Avian lineage splits at a young, narrow seaway imply a protracted history of mixed
population response. Molecular Ecology 26(20), 5752–5772.
Your map overstates the distribution. There are not populations on the mainland around “Auckland” and the area to the north of Auckland is generally restricted to the southern half of the drawn extent. More importantly , there are essentially no weka on most of Stewart Island (most southern island). All of the weka there are on very small islands offshore. Your extent of occurrence may need to be altered accordingly.