New York mammals

Grey Seal in New York

Halichoerus grypus

Native to New York

Not listed as nonindigenous in New York by USGS NAS; native to its New York range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Grey Seal in New York, by the numbers

Common in New York 30th most recorded of 102 mammals logged in New York

222 occurrence records
218 with iNaturalist photos
Jul 6, 2026 Last seen in New York

222 total records count every New York occurrence from GBIF and iNaturalist; the monthly chart covers the 221 records with a full observation date.

When to look for the Grey Seal in New York

Most sightings fall in April.

221 New York occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence.

Monthly New York records (table)
MonthRecords
January24
February9
March27
April52
May22
June21
July4
August5
September11
October4
November21
December21

Monthly grey seal occurrence records (iNaturalist and GBIF) in New York.

Seasonality

Year-round in New York, with recorded sightings peaking in April.

Occurrence map

Where Grey Seal has been recorded in New York

222 records mapped · zoom and drag to explore

136 New York records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Long Island 16
Gateway National Recreation Area 13
Fire Island National Seashore 7
Robert Moses State Park 3
Jones Beach State Park 1
Gilgo State Park 1

Protected places with the most grey seal sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in New York

CountyRecords
Suffolk County 85
Queens County 16
Nassau County 9
Kings County 3
Bronx County 3
Hamilton County 1
Oneida County 1
Other localities 104

The complete county distribution, spread across 7 New York counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Grey seals carry no formal NatureServe conservation rank in New York, SNA not applicable, and nearly all of the state’s 222 records, 218 of them, come from iNaturalist, meaning casual beachgoer sightings, not survey data, document most of what’s known about this species here. Long Island’s 16 logged sightings and Fire Island National Seashore’s 10 anchor the classic winter-into-spring haul-out beaches for this species.

April alone accounts for 52 of the 222 records, close to a quarter of the total, tracking the tail end of the winter haul-out season before seals disperse north; records drop to a low of 4 in July and October, consistent with most grey seals having left New York waters by summer.

Occurrence data from iNaturalist and GBIF.

More mammals in New York in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"