Spotted Lanternfly inMorris County, NJSPOTTED LANTERNFLY GUIDE
Morris County — one of New Jersey's wealthiest counties, with Morristown as its county seat — confirmed SLF in 2020 as populations expanded through northern New Jersey's suburban and exurban landscape. The county's character of large-lot suburban properties, equestrian estates, and extensive mature hardwood forest creates abundant SLF habitat with mature host trees across wide areas. NJ Transit's Morris & Essex lines have been significant spread vectors, moving SLF along the commuter corridor. Great Swamp National Wildlife Refuge and Jockey Hollow's mature hardwood forests are priority monitoring zones for SLF impact on ecologically significant landscapes.
Highest activity zones
SLF Hotspots in Morris County, NJ
Great Swamp National Wildlife Refuge
Active zone
Jockey Hollow / Morristown National Historical Park
Active zone
NJ Transit Morris Line
Active zone
Black River Wildlife Management Area
Active zone
Chester/Mendham rural horse country
Active zone
Primary SLF food source
Tree of Heaven in Morris County, NJ
Tree of Heaven is established along NJ Transit Morris Line rail corridors and road margins throughout Morris County, providing SLF dispersal pathways through the suburban interior. Great Swamp National Wildlife Refuge edges and the Black River Wildlife Management Area have Ailanthus populations at the boundary of wetland and upland habitat. Jockey Hollow / Morristown National Historical Park's mature hardwood forest is a significant concern as ToH continues to invade the historic grounds, creating SLF host conditions across this nationally significant landscape.
Identify Tree of Heaven →Local action resources
What To Do in Morris County, NJ
Report a Sighting
Every sighting in Morris County, NJ maps the invasion front. Report directly to NJ Department of Agriculture.
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 NJ State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full NJ guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Morris County, NJ. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Morris County, NJ.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Morris County, NJ.