What
Grey willow is recorded by a competent New Zealand authority as an introduced, invasive or managed threat subject.
The Hit List
Verified public Target identity
land · flora / algae
Grey willow
Salix cinerea
Also known as Grey sallow
Identification image pending
Why
The source identifies ecological, biosecurity or habitat risks that make this subject relevant to NZ Ex Games intelligence. Source context (Environment Canterbury): Environment Canterbury states grey willow displaces native species and alters waterways by blockage or flooding. This is the documented impact framing; severity remains site-specific.
Where
Distribution and current presence are place-specific and must be established from current authoritative or verified evidence.
Established knowledge
For consequential field decisions, consider the knowledge state and cited sources for each claim, and consult authoritative guidance where appropriate. Information and reliance terms
50% reference coverage — not scientific certainty or ecological progress
- Identification
- NZ status
- Ecological impact
- Sources
Open knowledge
These are parts of the public picture that could become clearer with better evidence.
- Distribution
- Visual clues
- Confusion species
- Regional intelligence
Sources & credits
- MPI — National Pest Plant Accordauthoritative · Canonical identity, New Zealand status and threat context
- Environment Canterbury — Grey willow (ecological-impact)authoritative · Supports the attributed ecological-impact context. Source scope and dates apply; this does not establish current local presence, current legal status or media reuse permission.
Field observations
Field observations connect sightings and signs with a place, time and source. They can support evidence after review. This dossier does not accept public submissions.
No field observations are published for this Target.
Commentary
Local experience, corrections and context help explain the public record. Commentary is not verified knowledge. This dossier does not accept public comments.
No commentary is published for this Target.
Questions and Missions
What can the sources tell us, and what still needs evidence? Explore dossier discoveries and research questions to understand this Target. Research leads identify knowledge gaps; they are not field assignments.
Explore Missions and Hunt mode for Grey willow- Where is grey willow currently established or emerging in New Zealand?Research question · evidence needed
- What evidence distinguishes current ecological impact from presence alone for grey willow?Research question · evidence needed
Shout Out
Shout Out
Share this record so others can explore the same question, place or ecological work. The link keeps its context and sources together.
Grey willow — The Hit List — NZ Ex Games
Canonical link
/hit-list/weed-grey-willow