Harstine Island

Ecosystem Overview

The Harstine Island ecosystem supports 17 documented wildlife species across 17 taxonomic genera. Located in Mason County, Washington, this area provides critical habitat with diverse natural communities. The location hosts 4 frequently observed species and 3 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While Mason County nearby has 83% more documented species, Harstine Island offers unique wildlife observation opportunities. This location ranks #3 for species diversity among 9 Mason County County natural areas, placing it in the 67th 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 9 locations

Species Distribution

Very Common4 species

Common5 species

Occasional5 species

Rare3 species

Regional Context

Regional Ranking

#3 of 9 locations

67th percentile for diversity

vs. Mason County

-83% 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 17 total documented species.

Turdus migratorius

American Robin

Very Common2 obs.

Nebria brevicollis

Very Common1 obs.

Anisolabis maritima

Maritime earwig

Very Common1 obs.

Pugettia producta

Very Common1 obs.

Eudistylia vancouveri

Very Common1 obs.

Melospiza melodia

Song Sparrow

Common1 obs.

Triglochin maritima

sea arrowgrass

Common1 obs.

Vaccinium ovatum

shot huckleberry

Common1 obs.

Cameraria gaultheriella

Common1 obs.

Cucumaria miniata

orange sea cucumber

Common1 obs.

Tresus capax

fat gaper

Common1 obs.

Onchidoris bilamellata

barnacle-eating onchidoris

Occasional1 obs.

Serpula columbiana

Occasional1 obs.

Procyon lotor

raccoon, northern raccoon

Occasional1 obs.

Eratigena duellica

giant house spider

Occasional1 obs.

Pterostichus lama

Occasional1 obs.

Neverita lewisii

Lewis' moonsnail

Occasional1 obs.

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Most Common Species

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Regional Comparison

Regional Ranking

Species Count

vs. Regional Average

Compared to 8 nearby locations in Mason County County, Washington

Nearby Natural Areas

Mason County

Importance: 0.40

100 species

-83% vs. current

Lagoon

Importance: 0.35

4 species

+325% vs. current

Mason Lake

Importance: 0.35

1 species

+1600% vs. current

Spencer Lake

Importance: 0.35

1 species

+1600% vs. current

Scarification Pond

Importance: 0.35

1 species

+1600% vs. current

Reflecting Pond

Importance: 0.35

1 species

+1600% vs. current

Howell Lake

Importance: 0.35

1 species

+1600% vs. current

Skokomish

Importance: 0.26

24 species

-29% 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 Mason 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

vs. Regional Average

Compared to 8 nearby locations in Mason County County, Washington

Nearby Natural Areas

Mason County

Importance: 0.40

100 species

-83% vs. current

Lagoon

Importance: 0.35

4 species

+325% vs. current

Mason Lake

Importance: 0.35

1 species

+1600% vs. current

Spencer Lake

Importance: 0.35

1 species

+1600% vs. current

Scarification Pond

Importance: 0.35

1 species

+1600% vs. current

Reflecting Pond

Importance: 0.35

1 species

+1600% vs. current

Howell Lake

Importance: 0.35

1 species

+1600% vs. current

Skokomish

Importance: 0.26

24 species

-29% 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 9 locations

Species Distribution

Very Common4 species

Common5 species

Occasional5 species

Rare3 species

Regional Context

Regional Ranking

#3 of 9 locations

67th percentile for diversity

vs. Mason County

-83% species diversity

Most Common Species

Showing 20 most frequently observed species out of 17 total documented species.

Turdus migratorius

American Robin

Very Common2 obs.

Nebria brevicollis

Very Common1 obs.

Anisolabis maritima

Maritime earwig

Very Common1 obs.

Pugettia producta

Very Common1 obs.

Eudistylia vancouveri

Very Common1 obs.

Melospiza melodia

Song Sparrow

Common1 obs.

Triglochin maritima

sea arrowgrass

Common1 obs.

Vaccinium ovatum

shot huckleberry

Common1 obs.

Cameraria gaultheriella

Common1 obs.

Cucumaria miniata

orange sea cucumber

Common1 obs.

Tresus capax

fat gaper

Common1 obs.

Onchidoris bilamellata

barnacle-eating onchidoris

Occasional1 obs.

Serpula columbiana

Occasional1 obs.

Procyon lotor

raccoon, northern raccoon

Occasional1 obs.

Eratigena duellica

giant house spider

Occasional1 obs.

Pterostichus lama

Occasional1 obs.

Neverita lewisii

Lewis' moonsnail

Occasional1 obs.

Want the Complete Field Guide?

Get all 17 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.