Why New Zealand Is Trying to Eradicate Rooks
Introduced from Europe in the 1860s, Rooks (Corvus frugilegus) form large flocks that destroy newly planted crops and tear up pasture across New Zealand farmland.
How to Spot a Rook: Adult Rooks are large glossy-black birds in the crow family with a distinctive patch of bare, greyish-white skin around the base of their heavy bill.
Why Reporting Works Best: Rooks are highly intelligent. When shot at, survivors abandon their treetop rookery and split into multiple new breeding colonies across neighbouring districts. Regional council biosecurity teams ask the public to report sightings so nests can be treated professionally in spring.