Mercer County

Ecosystem Overview

The Mercer County ecosystem supports 100 documented wildlife species across 97 taxonomic genera. Located in Mercer County, New Jersey, this area provides critical habitat with diverse natural communities. The location hosts 21 frequently observed species and 19 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. Compared to nearby Trenton, Mercer County hosts 317% more species diversity. This location ranks #2 for species diversity among 13 Mercer County County natural areas, placing it in the 85th percentile for biodiversity.

Biodiversity Highlights

100

Total Species

Documented wildlife species

Genus Diversity

Taxonomic genera represented

Common Species

Frequently observed species

Rare Species

Occasionally documented species

Regional Rank

Out of 13 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#2 of 13 locations

85th percentile for diversity

vs. Trenton

+317% species diversity

Ecosystem Overview

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Biodiversity Highlights

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Species Distribution

Very Common‌

Common‌

Occasional‌

Rare‌

Regional Context

Regional Ranking

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Most Common Species

Showing 20 most frequently observed species out of 100 total documented species.

Ardea herodias

Great Blue Heron

Very Common16 obs.

Branta canadensis

Canada goose

Very Common16 obs.

Symplocarpus foetidus

Skunk Cabbage

Very Common15 obs.

Spizella pusilla

Field Sparrow

Very Common15 obs.

Magicicada septendecim

Decim Periodical Cicada

Very Common14 obs.

Agelaius phoeniceus

Red-Winged Blackbird (Red-Winged)

Common14 obs.

Claytonia virginica

Eastern Springbeauty

Common14 obs.

Haliaeetus leucocephalus

Bald Eagle

Common13 obs.

Setophaga coronata

Myrtle Warbler

Common12 obs.

Enneacanthus gloriosus

Bluespotted sunfish

Common11 obs.

Anas platyrhynchos

mallard

Common11 obs.

Lonicera japonica

Japanese honeysuckle

Occasional11 obs.

Acer rubrum

Maple

Occasional11 obs.

Buteo jamaicensis

Red-tailed Hawk

Occasional10 obs.

Odocoileus virginianus

Key Deer

Occasional10 obs.

Alliaria petiolata

garlic mustard

Occasional10 obs.

Pinus strobus

White Pine

Occasional10 obs.

Cardinalis cardinalis

Northern Cardinal

Rare10 obs.

Geothlypis trichas

Common Yellowthroat (Arizela Group)

Rare9 obs.

Colaptes auratus

common flicker

Rare9 obs.

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Most Common Species

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Get Your Personalized Field Guide

Download a professional PDF field guide featuring all the species found in Mercer County. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

100

Species Count

+45%

vs. Regional Average

Compared to 8 nearby locations in Mercer County County, New Jersey

Nearby Natural Areas

Trenton

Importance: 0.54

24 species

+317% vs. current

Princeton Township

Importance: 0.35

100 species

0% vs. current

Hopewell Township

Importance: 0.35

100 species

0% vs. current

West Windsor Township

Importance: 0.35

100 species

0% vs. current

Hamilton Township

Importance: 0.35

100 species

0% vs. current

Lawrence Township

Importance: 0.35

100 species

0% vs. current

Robbinsville Township

Importance: 0.35

22 species

+355% vs. current

East Windsor Township

Importance: 0.35

5 species

+1900% vs. current

About This Comparison

These comparisons are based on documented wildlife observations from citizen science data. Locations with higher species counts may have more observation activity, different habitat types, or larger coverage areas. Regional rankings help identify biodiversity hotspots and unique natural areas within Mercer County County.

Regional Comparison

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Regional Ranking

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Species Count

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vs. Regional Average

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Nearby Natural Areas

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About This Comparison

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Regional Comparison

Regional Ranking

100

Species Count

+45%

vs. Regional Average

Compared to 8 nearby locations in Mercer County County, New Jersey

Nearby Natural Areas

Trenton

Importance: 0.54

24 species

+317% vs. current

Princeton Township

Importance: 0.35

100 species

0% vs. current

Hopewell Township

Importance: 0.35

100 species

0% vs. current

West Windsor Township

Importance: 0.35

100 species

0% vs. current

Hamilton Township

Importance: 0.35

100 species

0% vs. current

Lawrence Township

Importance: 0.35

100 species

0% vs. current

Robbinsville Township

Importance: 0.35

22 species

+355% vs. current

East Windsor Township

Importance: 0.35

5 species

+1900% vs. current

About This Comparison

Ecosystem Overview

Biodiversity Highlights

100

Total Species

Documented wildlife species

Genus Diversity

Taxonomic genera represented

Common Species

Frequently observed species

Rare Species

Occasionally documented species

Regional Rank

Out of 13 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#2 of 13 locations

85th percentile for diversity

vs. Trenton

+317% species diversity

Most Common Species

Showing 20 most frequently observed species out of 100 total documented species.

Ardea herodias

Great Blue Heron

Very Common16 obs.

Branta canadensis

Canada goose

Very Common16 obs.

Symplocarpus foetidus

Skunk Cabbage

Very Common15 obs.

Spizella pusilla

Field Sparrow

Very Common15 obs.

Magicicada septendecim

Decim Periodical Cicada

Very Common14 obs.

Agelaius phoeniceus

Red-Winged Blackbird (Red-Winged)

Common14 obs.

Claytonia virginica

Eastern Springbeauty

Common14 obs.

Haliaeetus leucocephalus

Bald Eagle

Common13 obs.

Setophaga coronata

Myrtle Warbler

Common12 obs.

Enneacanthus gloriosus

Bluespotted sunfish

Common11 obs.

Anas platyrhynchos

mallard

Common11 obs.

Lonicera japonica

Japanese honeysuckle

Occasional11 obs.

Acer rubrum

Maple

Occasional11 obs.

Buteo jamaicensis

Red-tailed Hawk

Occasional10 obs.

Odocoileus virginianus

Key Deer

Occasional10 obs.

Alliaria petiolata

garlic mustard

Occasional10 obs.

Pinus strobus

White Pine

Occasional10 obs.

Cardinalis cardinalis

Northern Cardinal

Rare10 obs.

Geothlypis trichas

Common Yellowthroat (Arizela Group)

Rare9 obs.

Colaptes auratus

common flicker

Rare9 obs.

Want the Complete Field Guide?

Get all 100 species with 3-4 high-quality images each, detailed descriptions, and a downloadable PDF for offline use.

Premium field guide includes identification tips, seasonal patterns, and professional layout optimized for field use.