Backing the bittern: The bird on the brink
... there are only between 30 and 50 bittern remaining in Waitaha/Canterbury, and fewer than 1,000 across the country. They are currently classed as ‘threatened - nationally critical.’ ...
https://www.ecan.govt.nz/get-involved/news-and-events/2024/backing-the-bittern-the-bird-on-the-brink