Assiscong Marsh

New Jersey · Northeast

Habitat
Wetland
Best Seasons
SpringFall
Difficulty

Moderate

Best Months

April-May, September-October

About This Location

Assiscong Marsh is a productive birding destination in New Jersey, with 217 species recorded on eBird. This wetland habitat attracts Canada Goose, Mourning Dove, and Red-bellied Woodpecker among many others. Spring and fall migration bring waves of warblers and shorebirds through the area.

Location

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Notable Species

Live Bird Data

Powered by eBird / Cornell Lab of Ornithology

Notable Sightings

Rare or unusual species spotted nearby in the last 14 days

Iceland Gull (kumlieni)

Larus glaucoides

3/6/2026North Branch Park1 observed

Red-throated Loon

Gavia stellata

3/6/2026Round Valley Recreation Area1 observed

Greater Scaup

Aythya marila

3/5/2026Millstone River Impoundment1 observed

Cackling Goose

Branta hutchinsii

3/4/2026Merrill Creek Reservoir--South Dam area1 observed

Red-headed Woodpecker

Melanerpes erythrocephalus

3/4/2026South Branch Reservation- Stanton Station Section1 observed

Red-breasted Merganser

Mergus serrator

3/4/2026Millstone River Impoundment1 observed

Greater White-fronted x Canada Goose (hybrid)

Anser albifrons x Branta canadensis

3/3/2026Opie Road1 observed

Snow x Canada Goose (hybrid)

Anser caerulescens x Branta canadensis

3/3/2026Norz Farm Fields (Hillsborough Twp.)1 observed

Song Sparrow (melodia/atlantica)

Melospiza melodia

3/3/2026Millstone River Impoundment1 observed

Red-tailed Hawk (abieticola)

Buteo jamaicensis

3/2/2026South Branch Reservation - Wings Section1 observed

Pink-footed Goose

Anser brachyrhynchus

3/2/2026Merrill Creek Reservoir--South Dam area1 observed

Recent Observations

Species reported at this location in the last 14 days

Canada Goose

12/28/2026

Mourning Dove

22/28/2026

Red-bellied Woodpecker

12/28/2026

Downy Woodpecker

12/28/2026

Northern Flicker

12/28/2026

Blue Jay

42/28/2026

American Crow

12/28/2026

European Starling

252/28/2026

American Robin

122/28/2026

Dark-eyed Junco

12/28/2026

Red-winged Blackbird

62/28/2026

Northern Cardinal

22/28/2026

Eastern Screech-Owl

12/25/2026

White-throated Sparrow

22/25/2026

Birding Tips

  1. 1

    Bring waterproof boots for marsh trails and muddy edges.

  2. 2

    Scan the edges of open water for herons, egrets, and rails at dawn.

  3. 3

    Visit during mid-May for peak warbler migration.

Frequently Asked Questions

When is the best time to visit Assiscong Marsh for birding?
The best months to visit Assiscong Marsh for birding are April-May, September-October. The best seasons are Spring and Fall.
What birds can I see at Assiscong Marsh?
Notable species at Assiscong Marsh include Canada Goose, Mourning Dove, Red-bellied Woodpecker, Downy Woodpecker, Northern Flicker. The area supports wetland habitats.
How difficult is birding at Assiscong Marsh?
Birding at Assiscong Marsh is rated as Moderate. Some trails may require moderate fitness and basic hiking ability.
What amenities are available at Assiscong Marsh?
Assiscong Marsh offers the following amenities: Parking, Trails.