San Juan County

Ecosystem Overview

The San Juan County ecosystem supports 100 documented wildlife species across 95 taxonomic genera. Located in San Juan County, Washington, 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 Blind Island, San Juan County hosts 0% more species diversity. This location ranks #2 for species diversity among 18 San Juan County County natural areas, placing it in the 89th 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 18 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#2 of 18 locations

89th percentile for diversity

vs. Blind Island

+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.

Zonotrichia leucophrys

white-crowned sparrow

Very Common46 obs.

Haliaeetus leucocephalus

Bald Eagle

Very Common39 obs.

Sedum spathulifolium

Colorado Stonecrop

Very Common38 obs.

Ardea herodias

Great Blue Heron

Very Common35 obs.

Arbutus menziesii

Pacific madrone

Very Common30 obs.

Pisaster ochraceus

ochre stars

Common29 obs.

Gaultheria shallon

shallal

Common25 obs.

Corvus brachyrhynchos

American Crow

Common24 obs.

Lontra canadensis

River Otter

Common23 obs.

Cepphus columba

Pigeon Guillemot

Common22 obs.

Pipilo maculatus

Spotted Towhee (Maculatus Group)

Common22 obs.

Turdus migratorius

American Robin

Occasional22 obs.

Pseudotsuga menziesii

Oregon Pine

Occasional21 obs.

Hemigrapsus oregonensis

yellow shore crab

Occasional21 obs.

Cancer productus

Occasional21 obs.

Vulpes vulpes

fox, red fox

Occasional21 obs.

Holodiscus discolor

hillside oceanspray

Occasional21 obs.

Quercus garryana

Oregon White Oak

Rare21 obs.

Malacosoma californica

Rare20 obs.

Cucumaria miniata

orange sea cucumber

Rare20 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 San Juan County. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

100

Species Count

+1150%

vs. Regional Average

Compared to 8 nearby locations in San Juan County County, Washington

Nearby Natural Areas

Cascade Lake

Importance: 0.35

10 species

+900% vs. current

Hummel Lake

Importance: 0.35

5 species

+1900% vs. current

Mountain Lake

Importance: 0.35

4 species

+2400% vs. current

Fish Hook Lake

Importance: 0.35

4 species

+2400% vs. current

Flahertys Pond

Importance: 0.35

2 species

+4900% vs. current

Dream Lake

Importance: 0.35

1 species

+9900% vs. current

Sucia Island

Importance: 0.33

26 species

+285% vs. current

James Island

Importance: 0.33

11 species

+809% 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 Juan 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

+1150%

vs. Regional Average

Compared to 8 nearby locations in San Juan County County, Washington

Nearby Natural Areas

Cascade Lake

Importance: 0.35

10 species

+900% vs. current

Hummel Lake

Importance: 0.35

5 species

+1900% vs. current

Mountain Lake

Importance: 0.35

4 species

+2400% vs. current

Fish Hook Lake

Importance: 0.35

4 species

+2400% vs. current

Flahertys Pond

Importance: 0.35

2 species

+4900% vs. current

Dream Lake

Importance: 0.35

1 species

+9900% vs. current

Sucia Island

Importance: 0.33

26 species

+285% vs. current

James Island

Importance: 0.33

11 species

+809% 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 18 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#2 of 18 locations

89th percentile for diversity

vs. Blind Island

+0% species diversity

Most Common Species

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

Zonotrichia leucophrys

white-crowned sparrow

Very Common46 obs.

Haliaeetus leucocephalus

Bald Eagle

Very Common39 obs.

Sedum spathulifolium

Colorado Stonecrop

Very Common38 obs.

Ardea herodias

Great Blue Heron

Very Common35 obs.

Arbutus menziesii

Pacific madrone

Very Common30 obs.

Pisaster ochraceus

ochre stars

Common29 obs.

Gaultheria shallon

shallal

Common25 obs.

Corvus brachyrhynchos

American Crow

Common24 obs.

Lontra canadensis

River Otter

Common23 obs.

Cepphus columba

Pigeon Guillemot

Common22 obs.

Pipilo maculatus

Spotted Towhee (Maculatus Group)

Common22 obs.

Turdus migratorius

American Robin

Occasional22 obs.

Pseudotsuga menziesii

Oregon Pine

Occasional21 obs.

Hemigrapsus oregonensis

yellow shore crab

Occasional21 obs.

Cancer productus

Occasional21 obs.

Vulpes vulpes

fox, red fox

Occasional21 obs.

Holodiscus discolor

hillside oceanspray

Occasional21 obs.

Quercus garryana

Oregon White Oak

Rare21 obs.

Malacosoma californica

Rare20 obs.

Cucumaria miniata

orange sea cucumber

Rare20 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.