Gravina Island

Ecosystem Overview

The Gravina Island ecosystem supports 7 documented wildlife species across 7 taxonomic genera. Located in Ketchikan Gateway, Alaska, this area provides critical habitat with diverse natural communities. The location hosts 2 frequently observed species and 1 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While Ketchikan Gateway nearby has 93% more documented species, Gravina Island offers unique wildlife observation opportunities. This location ranks #3 for species diversity among 3 Ketchikan Gateway County natural areas, placing it in the 0th 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 3 locations

Species Distribution

Very Common2 species

Common2 species

Occasional2 species

Rare1 species

Regional Context

Regional Ranking

#3 of 3 locations

0th percentile for diversity

vs. Ketchikan Gateway

-93% 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 7 total documented species.

Polytrichum juniperinum

Juniper Haircap

Very Common1 obs.

Pilosella aurantiaca

King-Devil

Very Common1 obs.

Lapsana communis

Nipplewort

Very Common1 obs.

Hypericum perforatum

Perforate St John'S-Wort

Very Common1 obs.

Struthiopteris spicant

deer fern

Very Common1 obs.

Digitalis purpurea

foxglove

Common1 obs.

Leucanthemum vulgare

ox-eye daisy

Common1 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 Gravina Island. Perfect for outdoor adventures, education, and nature exploration.

$6.99

Get Your Personalized Field Guide

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

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Regional Comparison

Regional Ranking

Species Count

-93%

vs. Regional Average

Compared to 2 nearby locations in Ketchikan Gateway County, Alaska

Nearby Natural Areas

Ketchikan Gateway

Importance: 0.37

100 species

-93% vs. current

Revillagigedo Island

Importance: 0.25

100 species

-93% 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 Ketchikan Gateway 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

-93%

vs. Regional Average

Compared to 2 nearby locations in Ketchikan Gateway County, Alaska

Nearby Natural Areas

Ketchikan Gateway

Importance: 0.37

100 species

-93% vs. current

Revillagigedo Island

Importance: 0.25

100 species

-93% 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 3 locations

Species Distribution

Very Common2 species

Common2 species

Occasional2 species

Rare1 species

Regional Context

Regional Ranking

#3 of 3 locations

0th percentile for diversity

vs. Ketchikan Gateway

-93% species diversity

Most Common Species

Showing 20 most frequently observed species out of 7 total documented species.

Polytrichum juniperinum

Juniper Haircap

Very Common1 obs.

Pilosella aurantiaca

King-Devil

Very Common1 obs.

Lapsana communis

Nipplewort

Very Common1 obs.

Hypericum perforatum

Perforate St John'S-Wort

Very Common1 obs.

Struthiopteris spicant

deer fern

Very Common1 obs.

Digitalis purpurea

foxglove

Common1 obs.

Leucanthemum vulgare

ox-eye daisy

Common1 obs.

Want the Complete Field Guide?

Get all 7 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.