East Rock

Ecosystem Overview

The East Rock ecosystem supports 85 documented wildlife species across 79 taxonomic genera. Located in New Haven County, Connecticut, this area provides critical habitat with diverse natural communities. The location hosts 18 frequently observed species and 16 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While New Haven nearby has 15% more documented species, East Rock offers unique wildlife observation opportunities. This location ranks #6 for species diversity among 21 New Haven County County natural areas, placing it in the 71th percentile for biodiversity.

Biodiversity Highlights

Total Species

Documented wildlife species

Genus Diversity

Taxonomic genera represented

Common Species

Frequently observed species

Rare Species

Occasionally documented species

Regional Rank

Out of 21 locations

Species Distribution

Very Common18 species

Common25 species

Occasional26 species

Rare16 species

Regional Context

Regional Ranking

#6 of 21 locations

71th percentile for diversity

vs. New Haven

-15% 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 85 total documented species.

Vincetoxicum rossicum

Pale swallow-wort

Very Common5 obs.

Vincetoxicum nigrum

dark vincetoxicum

Very Common4 obs.

Lasius neoniger

Turfgrass Ant

Very Common3 obs.

Zonotrichia albicollis

white-throated sparrow

Very Common3 obs.

Prenolepis imparis

Small Honey Ant

Very Common3 obs.

Glischrochilus fasciatus

picnic beetle

Common2 obs.

Cardinalis cardinalis

Northern Cardinal

Common2 obs.

Apis mellifera

Western Honey Bee

Common2 obs.

Plethodon cinereus

Eastern Red-Backed Salamander

Common2 obs.

Phaneroptera nana

Southern sickle bush-cricket

Common2 obs.

Pachydiplax longipennis

Blue Dasher

Common2 obs.

Artemisia vulgaris

mugwort

Occasional2 obs.

Tetramorium immigrans

Pavement Ant

Occasional2 obs.

Phidippus audax

Bold Jumper

Occasional2 obs.

Idia americalis

American Idia Moth

Occasional2 obs.

Dolichovespula maculata

Baldfaced Hornet

Occasional2 obs.

Toxomerus marginatus

Syrphid Fly

Occasional2 obs.

Bombus impatiens

Common Eastern Bumblebee

Rare1 obs.

Cotinis nitida

Rare1 obs.

Mycetophagus pluripunctatus

Rare1 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 East Rock. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

Species Count

+23%

vs. Regional Average

Compared to 8 nearby locations in New Haven County County, Connecticut

Nearby Natural Areas

New Haven

Importance: 0.55

100 species

-15% vs. current

Meriden

Importance: 0.44

100 species

-15% vs. current

New Haven County

Importance: 0.42

100 species

-15% vs. current

Hamden

Importance: 0.35

100 species

-15% vs. current

North Haven

Importance: 0.35

100 species

-15% vs. current

Mill River

Importance: 0.35

29 species

+193% vs. current

Branford Supply Pond

Importance: 0.35

14 species

+507% vs. current

Baldwins Pond

Importance: 0.35

10 species

+750% 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 New Haven 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

Species Count

+23%

vs. Regional Average

Compared to 8 nearby locations in New Haven County County, Connecticut

Nearby Natural Areas

New Haven

Importance: 0.55

100 species

-15% vs. current

Meriden

Importance: 0.44

100 species

-15% vs. current

New Haven County

Importance: 0.42

100 species

-15% vs. current

Hamden

Importance: 0.35

100 species

-15% vs. current

North Haven

Importance: 0.35

100 species

-15% vs. current

Mill River

Importance: 0.35

29 species

+193% vs. current

Branford Supply Pond

Importance: 0.35

14 species

+507% vs. current

Baldwins Pond

Importance: 0.35

10 species

+750% vs. current

About This Comparison

Ecosystem Overview

Biodiversity Highlights

Total Species

Documented wildlife species

Genus Diversity

Taxonomic genera represented

Common Species

Frequently observed species

Rare Species

Occasionally documented species

Regional Rank

Out of 21 locations

Species Distribution

Very Common18 species

Common25 species

Occasional26 species

Rare16 species

Regional Context

Regional Ranking

#6 of 21 locations

71th percentile for diversity

vs. New Haven

-15% species diversity

Most Common Species

Showing 20 most frequently observed species out of 85 total documented species.

Vincetoxicum rossicum

Pale swallow-wort

Very Common5 obs.

Vincetoxicum nigrum

dark vincetoxicum

Very Common4 obs.

Lasius neoniger

Turfgrass Ant

Very Common3 obs.

Zonotrichia albicollis

white-throated sparrow

Very Common3 obs.

Prenolepis imparis

Small Honey Ant

Very Common3 obs.

Glischrochilus fasciatus

picnic beetle

Common2 obs.

Cardinalis cardinalis

Northern Cardinal

Common2 obs.

Apis mellifera

Western Honey Bee

Common2 obs.

Plethodon cinereus

Eastern Red-Backed Salamander

Common2 obs.

Phaneroptera nana

Southern sickle bush-cricket

Common2 obs.

Pachydiplax longipennis

Blue Dasher

Common2 obs.

Artemisia vulgaris

mugwort

Occasional2 obs.

Tetramorium immigrans

Pavement Ant

Occasional2 obs.

Phidippus audax

Bold Jumper

Occasional2 obs.

Idia americalis

American Idia Moth

Occasional2 obs.

Dolichovespula maculata

Baldfaced Hornet

Occasional2 obs.

Toxomerus marginatus

Syrphid Fly

Occasional2 obs.

Bombus impatiens

Common Eastern Bumblebee

Rare1 obs.

Cotinis nitida

Rare1 obs.

Mycetophagus pluripunctatus

Rare1 obs.

Want the Complete Field Guide?

Get all 85 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.