Unalaska Island

Ecosystem Overview

The Unalaska Island ecosystem supports 100 documented wildlife species across 93 taxonomic genera. Located in Aleutians West Census Area, Alaska, 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 Umnak Island, Unalaska Island hosts 0% more species diversity. This location ranks #1 for species diversity among 4 Aleutians West Census Area County natural areas, placing it in the 75th 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 4 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#1 of 4 locations

75th percentile for diversity

vs. Umnak Island

+0% species diversity

Ecosystem Overview

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Biodiversity Highlights

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Species Distribution

Very Common‌

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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.

Ligusticum scothicum

Scotch Licorice-root

Very Common6 obs.

Chamaenerion angustifolium

French-Willow

Very Common5 obs.

Heracleum maximum

American Cow Parsnip

Very Common4 obs.

Veronica stelleri

Very Common4 obs.

Petridiobius arcticus

Very Common4 obs.

Cornus suecica

dwarf cornel

green sea urchin

Occasional3 obs.

Semibalanus cariosus

Occasional3 obs.

Rare3 obs.

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Most Common Species

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Want the Complete Field Guide?

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Get Your Personalized Field Guide

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

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Regional Comparison

Regional Ranking

100

Species Count

+194%

vs. Regional Average

Compared to 3 nearby locations in Aleutians West Census Area County, Alaska

Nearby Natural Areas

Amaknak Island

in Unalaska

Importance: 0.39

100 species

0% vs. current

Adak Island

Importance: 0.39

2 species

+4900% vs. current

Tumdaanax Anii

Importance: 0.35

1 species

+9900% 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 Aleutians West Census Area 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

+194%

vs. Regional Average

Compared to 3 nearby locations in Aleutians West Census Area County, Alaska

Nearby Natural Areas

Amaknak Island

in Unalaska

Importance: 0.39

100 species

0% vs. current

Adak Island

Importance: 0.39

2 species

+4900% vs. current

Tumdaanax Anii

Importance: 0.35

1 species

+9900% 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 4 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#1 of 4 locations

75th percentile for diversity

vs. Umnak Island

+0% species diversity

Most Common Species

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

Ligusticum scothicum

Scotch Licorice-root

Very Common6 obs.

Chamaenerion angustifolium

French-Willow

Very Common5 obs.

Heracleum maximum

American Cow Parsnip

Very Common4 obs.

Veronica stelleri

Very Common4 obs.

Petridiobius arcticus

Very Common4 obs.

Cornus suecica

dwarf cornel

Common4 obs.

Geum calthifolium

Carex macrochaeta

Alaska large-awned sedge

Occasional3 obs.

Trichophorum cespitosum

cespitose bulrush

Rare3 obs.

Leymus mollis

American dunegrass

Rare3 obs.

Balanus glandula

Rare3 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.