Spotted Lanternfly inYonkers, NYSPOTTED LANTERNFLY GUIDE
Yonkers — Westchester County's largest city and the fourth-largest in New York State — confirmed SLF in 2021. Directly adjacent to the Bronx, Yonkers is an NYC-adjacent urban center with dense residential tree canopy supporting established SLF populations throughout its neighborhoods. The Saw Mill River Parkway and Cross County Parkway intersection creates a major vehicle-based SLF dispersal node, and the Metro-North Hudson Line terminus concentrates commuter traffic daily between Yonkers and Midtown Manhattan. The Hudson River waterfront provides prime Tree of Heaven habitat running along the city's western edge, and Yonkers Raceway's sprawling complex adds additional SLF pressure in the city's urban core.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Saw Mill River Parkway corridor (heavy TOH)
Active zone
Cross County Parkway interchange zone
Active zone
Hudson River waterfront parks
Active zone
Yonkers Raceway complex
Active zone
Metro-North Hudson Line rail margins
Active zone
Primary SLF food source
Tree of Heaven in Yonkers, NY
The Saw Mill River Parkway corridor through Yonkers has established Tree of Heaven populations along its margins — a primary SLF spread highway running north through Westchester County. The Hudson River waterfront's disturbed industrial areas and park margins harbor significant TOH populations supporting active SLF colonies. Yonkers' dense urban residential tree canopy — one of the highest concentrations in Westchester County — sustains large SLF populations spreading through the city's neighborhoods. Metro-North Hudson Line stations are documented SLF dispersal vectors connecting Yonkers populations to New York City's heavily infested outer boroughs and to communities further north along the Hudson Valley corridor.
Identify Tree of Heaven →Local action resources
What To Do in Yonkers, NY
Report a Sighting
Every sighting in Yonkers, NY maps the invasion front. Report directly to New York State DEC.
Report Now →Squish on Sight
See a spotted lanternfly? Kill it immediately — it is legal and encouraged in all states. Learn the best kill methods.
Full Fight Guide →Map ToH in Your Block
Tree of Heaven removal cuts off SLF food supply. Add ToH sightings to the community map to guide removal efforts.
View Sighting Map →Statewide resources
Full New York State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full New York guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Yonkers, NY. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Yonkers, NY.
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