Spotted Lanternfly inMount Vernon, NYSPOTTED LANTERNFLY GUIDE
Mount Vernon — directly bordering the Bronx and New York City — confirmed SLF in 2021 and is among the most heavily infested communities in Westchester County given its immediate adjacency to the five boroughs. The city is served by both Metro-North's Harlem and New Haven lines, concentrating commuter traffic that moves SLF egg masses daily between Mount Vernon and NYC. The Bronx River corridor provides the city's primary Tree of Heaven habitat, running through a densely urban landscape with limited public green space but high urban tree canopy throughout residential neighborhoods. The city's position at the Westchester-Bronx boundary makes it a key node in the NYC-to-Westchester SLF spread front.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Bronx River corridor (TOH-dense riparian zone)
Active zone
Metro-North Harlem Line stations
Active zone
Metro-North New Haven Line corridor
Active zone
Urban street tree network throughout city
Active zone
I-95 / Hutchinson River Parkway border zone
Active zone
Primary SLF food source
Tree of Heaven in Mount Vernon, NY
The Bronx River corridor running through Mount Vernon is the city's primary SLF habitat zone — Tree of Heaven is established along the riparian margins of the Bronx River, providing a dense TOH corridor connecting Mount Vernon's populations directly to the heavily infested Bronx and New York City SLF zone to the south. Metro-North Harlem and New Haven line stations are primary SLF dispersal vectors, with commuter vehicles moving egg masses between Mount Vernon and NYC daily. Urban street trees and residential tree canopy throughout Mount Vernon's densely developed neighborhoods sustain large SLF populations in a highly urbanized landscape with limited traditional park space but extensive canopy cover.
Identify Tree of Heaven →Local action resources
What To Do in Mount Vernon, NY
Report a Sighting
Every sighting in Mount Vernon, 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 Mount Vernon, NY. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Mount Vernon, NY.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Mount Vernon, NY.