North Island

Ecosystem Overview

The North Island ecosystem supports 100 documented wildlife species across 93 taxonomic genera. Located in San Diego County, California, 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. This location ranks #13 for species diversity among 89 San Diego 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

#13

Regional Rank

Out of 89 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#13 of 89 locations

85th percentile for diversity

vs. San Diego

0% 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.

Larus occidentalis

Western Gull

Very Common40 obs.

Donax gouldii

Gould beanclam

Very Common21 obs.

Tivela stultorum

Pismo clam

Very Common18 obs.

Corvus brachyrhynchos

American Crow

Very Common16 obs.

Cakile maritima

sea rocket

Very Common13 obs.

Sayornis nigricans

black phoebe

Common11 obs.

Dendraster excentricus

eccentric sand dollar sea urchin

Common10 obs.

Calidris alba

sanderling

Common10 obs.

Ardea herodias

Great Blue Heron

Common9 obs.

Larus delawarensis

Ring-billed Gull

Common8 obs.

Limosa fedoa

Marbled Godwit

Common7 obs.

Heterotheca grandiflora

Telegraphweed

Occasional7 obs.

Mimus polyglottos

Northern Mockingbird

Occasional7 obs.

Carpobrotus chilensis

Sea fig

Occasional6 obs.

Ambrosia chamissonis

beachbur

Occasional6 obs.

Camissoniopsis cheiranthifolia

beach suncup

Occasional6 obs.

Tringa semipalmata

Willet

Occasional6 obs.

Crucibulum spinosum

Spiny cup and saucer shell

Rare6 obs.

Pluvialis squatarola

grey plover

Rare6 obs.

Lepus californicus

Black-tailed Jack Rabbit

Rare5 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 North Island. Perfect for outdoor adventures, education, and nature exploration.

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Regional Comparison

Regional Ranking

100

Species Count

vs. Regional Average

Compared to 8 nearby locations in San Diego County County, California

Nearby Natural Areas

San Diego

Importance: 0.63

100 species

0% vs. current

San Diego County

Importance: 0.55

100 species

0% vs. current

Carlsbad

Importance: 0.47

100 species

0% vs. current

Oceanside

Importance: 0.46

100 species

0% vs. current

Escondido

Importance: 0.45

100 species

0% vs. current

Chula Vista

Importance: 0.45

100 species

0% vs. current

San Marcos

Importance: 0.44

100 species

0% vs. current

Coronado

Importance: 0.42

100 species

0% 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 San Diego 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

vs. Regional Average

Compared to 8 nearby locations in San Diego County County, California

Nearby Natural Areas

San Diego

Importance: 0.63

100 species

0% vs. current

San Diego County

Importance: 0.55

100 species

0% vs. current

Carlsbad

Importance: 0.47

100 species

0% vs. current

Oceanside

Importance: 0.46

100 species

0% vs. current

Escondido

Importance: 0.45

100 species

0% vs. current

Chula Vista

Importance: 0.45

100 species

0% vs. current

San Marcos

Importance: 0.44

100 species

0% vs. current

Coronado

Importance: 0.42

100 species

0% 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

#13

Regional Rank

Out of 89 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#13 of 89 locations

85th percentile for diversity

vs. San Diego

0% species diversity

Most Common Species

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

Larus occidentalis

Western Gull

Very Common40 obs.

Donax gouldii

Gould beanclam

Very Common21 obs.

Tivela stultorum

Pismo clam

Very Common18 obs.

Corvus brachyrhynchos

American Crow

Very Common16 obs.

Cakile maritima

sea rocket

Very Common13 obs.

Sayornis nigricans

black phoebe

Common11 obs.

Dendraster excentricus

eccentric sand dollar sea urchin

Common10 obs.

Calidris alba

sanderling

Common10 obs.

Ardea herodias

Great Blue Heron

Common9 obs.

Larus delawarensis

Ring-billed Gull

Common8 obs.

Limosa fedoa

Marbled Godwit

Common7 obs.

Heterotheca grandiflora

Telegraphweed

Occasional7 obs.

Mimus polyglottos

Northern Mockingbird

Occasional7 obs.

Carpobrotus chilensis

Sea fig

Occasional6 obs.

Ambrosia chamissonis

beachbur

Occasional6 obs.

Camissoniopsis cheiranthifolia

beach suncup

Occasional6 obs.

Tringa semipalmata

Willet

Occasional6 obs.

Crucibulum spinosum

Spiny cup and saucer shell

Rare6 obs.

Pluvialis squatarola

grey plover

Rare6 obs.

Lepus californicus

Black-tailed Jack Rabbit

Rare5 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.