Oak Island Marsh

Ecosystem Overview

The Oak Island Marsh ecosystem supports 3 documented wildlife species across 3 taxonomic genera. Located in Washington County, Oregon, this area provides critical habitat with diverse natural communities. The location hosts 1 frequently observed species and 0 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While Hillsboro nearby has 97% more documented species, Oak Island Marsh offers unique wildlife observation opportunities. This location ranks #13 for species diversity among 16 Washington County County natural areas, placing it in the 19th 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

#13

Regional Rank

Out of 16 locations

Species Distribution

Very Common1 species

Common1 species

Occasional1 species

Rare0 species

Regional Context

Regional Ranking

#13 of 16 locations

19th percentile for diversity

vs. Hillsboro

-97% 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 3 total documented species.

Passerculus sandwichensis

Savannah Sparrow

Very Common1 obs.

Branta hutchinsii

hutchins’s canada goose

Very Common1 obs.

Spatula cyanoptera

Cinnamon Teal

Very 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 Oak Island Marsh. Perfect for outdoor adventures, education, and nature exploration.

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

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Regional Comparison

Regional Ranking

Species Count

-96%

vs. Regional Average

Compared to 8 nearby locations in Washington County County, Oregon

Nearby Natural Areas

Hillsboro

Importance: 0.46

100 species

-97% vs. current

Beaverton

Importance: 0.45

100 species

-97% vs. current

Washington County

Importance: 0.43

100 species

-97% vs. current

Tigard

Importance: 0.42

100 species

-97% vs. current

Forest Grove

Importance: 0.38

100 species

-97% vs. current

Commonwealth Lake

Importance: 0.35

33 species

-91% vs. current

Wapato Marsh

Importance: 0.35

19 species

-84% vs. current

Bethany Lake

Importance: 0.35

9 species

-67% 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 Washington 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

-96%

vs. Regional Average

Compared to 8 nearby locations in Washington County County, Oregon

Nearby Natural Areas

Hillsboro

Importance: 0.46

100 species

-97% vs. current

Beaverton

Importance: 0.45

100 species

-97% vs. current

Washington County

Importance: 0.43

100 species

-97% vs. current

Tigard

Importance: 0.42

100 species

-97% vs. current

Forest Grove

Importance: 0.38

100 species

-97% vs. current

Commonwealth Lake

Importance: 0.35

33 species

-91% vs. current

Wapato Marsh

Importance: 0.35

19 species

-84% vs. current

Bethany Lake

Importance: 0.35

9 species

-67% 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

#13

Regional Rank

Out of 16 locations

Species Distribution

Very Common1 species

Common1 species

Occasional1 species

Rare0 species

Regional Context

Regional Ranking

#13 of 16 locations

19th percentile for diversity

vs. Hillsboro

-97% species diversity

Most Common Species

Showing 20 most frequently observed species out of 3 total documented species.

Passerculus sandwichensis

Savannah Sparrow

Very Common1 obs.

Branta hutchinsii

hutchins’s canada goose

Very Common1 obs.

Spatula cyanoptera

Cinnamon Teal

Very Common1 obs.

Want the Complete Field Guide?

Get all 3 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.