Based on 2,521 research-grade iNaturalist observations in New York, Brown Rat is most often recorded in September; in New York it behaves like a year-round resident. It ranks #8 among mammals recorded in the state in our data.
Rattus norvegicus
Brown Rat in New York by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in New York in September
Eastern Gray Squirrel
White-tailed Deer
Eastern Chipmunk
Groundhog
Eastern Cottontail
Common Raccoon
American Black Bear
Striped Skunk
Places to look in New York
Botanical GardenNew York Botanical Garden
Botanical GardenBrooklyn Botanic Garden
State ParkAdirondack Park
Botanical GardenQueens Botanical Garden
State ParkFranklin D. Roosevelt Four Freedoms Park
Botanical GardenPlanting Fields Arboretum State Historic Park
FAQ
When does Brown Rat appear in New York?
Mainly August–July, with the most records in September.
How common is Brown Rat in New York?
It ranks #8 by number of iNaturalist observations among mammals in New York (2,521 records in our sample).