Mercer Island

Ecosystem Overview

The Mercer Island ecosystem supports 93 documented wildlife species across 89 taxonomic genera. Located in King County, Washington, this area provides critical habitat with diverse natural communities. The location hosts 19 frequently observed species and 18 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While Seattle nearby has 7% more documented species, Mercer Island offers unique wildlife observation opportunities. This location ranks #17 for species diversity among 98 King County County natural areas, placing it in the 83th 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

#17

Regional Rank

Out of 98 locations

Species Distribution

Very Common19 species

Common28 species

Occasional28 species

Rare18 species

Regional Context

Regional Ranking

#17 of 98 locations

83th percentile for diversity

vs. Seattle

-7% 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 93 total documented species.

Tomocerus minor

Very Common3 obs.

Mycelis muralis

wall lettuce

Very Common3 obs.

Entomobrya triangularis

Very Common3 obs.

Parmotrema arnoldii

Very Common2 obs.

Deinopteroloma subcostatum

Very Common2 obs.

Prophysaon andersonii

Reticulate taildropper

Common2 obs.

Rubus bifrons

Common2 obs.

Oemleria cerasiformis

Indian plum

Common2 obs.

Vaccinium ovatum

shot huckleberry

Common2 obs.

Melanostoma mellina

Common2 obs.

Bucephala clangula

common goldeneye

Common2 obs.

Coccomyces dentatus

Occasional2 obs.

Polystichum munitum

western sword fern

Occasional2 obs.

Omus audouini

Occasional1 obs.

Suillia variegata

Occasional1 obs.

Scathophaga furcata

Occasional1 obs.

Agromyza vockerothi

Occasional1 obs.

Amphimallon majale

Rare1 obs.

Psyllobora borealis

Rare1 obs.

Nebria brevicollis

Rare1 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 Mercer Island. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

Species Count

-7%

vs. Regional Average

Compared to 8 nearby locations in King County County, Washington

Nearby Natural Areas

Seattle

Importance: 0.69

100 species

-7% vs. current

Bellevue

Importance: 0.47

100 species

-7% vs. current

King County

Importance: 0.47

100 species

-7% vs. current

Renton

Importance: 0.45

100 species

-7% vs. current

Redmond

Importance: 0.45

100 species

-7% vs. current

Shoreline

Importance: 0.44

100 species

-7% vs. current

Issaquah

Importance: 0.44

100 species

-7% vs. current

Tukwila

Importance: 0.44

100 species

-7% 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 King 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

-7%

vs. Regional Average

Compared to 8 nearby locations in King County County, Washington

Nearby Natural Areas

Seattle

Importance: 0.69

100 species

-7% vs. current

Bellevue

Importance: 0.47

100 species

-7% vs. current

King County

Importance: 0.47

100 species

-7% vs. current

Renton

Importance: 0.45

100 species

-7% vs. current

Redmond

Importance: 0.45

100 species

-7% vs. current

Shoreline

Importance: 0.44

100 species

-7% vs. current

Issaquah

Importance: 0.44

100 species

-7% vs. current

Tukwila

Importance: 0.44

100 species

-7% 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

#17

Regional Rank

Out of 98 locations

Species Distribution

Very Common19 species

Common28 species

Occasional28 species

Rare18 species

Regional Context

Regional Ranking

#17 of 98 locations

83th percentile for diversity

vs. Seattle

-7% species diversity

Most Common Species

Showing 20 most frequently observed species out of 93 total documented species.

Tomocerus minor

Very Common3 obs.

Mycelis muralis

wall lettuce

Very Common3 obs.

Entomobrya triangularis

Very Common3 obs.

Parmotrema arnoldii

Very Common2 obs.

Deinopteroloma subcostatum

Very Common2 obs.

Prophysaon andersonii

Reticulate taildropper

Common2 obs.

Rubus bifrons

Common2 obs.

Oemleria cerasiformis

Indian plum

Common2 obs.

Vaccinium ovatum

shot huckleberry

Common2 obs.

Melanostoma mellina

Common2 obs.

Bucephala clangula

common goldeneye

Common2 obs.

Coccomyces dentatus

Occasional2 obs.

Polystichum munitum

western sword fern

Occasional2 obs.

Omus audouini

Occasional1 obs.

Suillia variegata

Occasional1 obs.

Scathophaga furcata

Occasional1 obs.

Agromyza vockerothi

Occasional1 obs.

Amphimallon majale

Rare1 obs.

Psyllobora borealis

Rare1 obs.

Nebria brevicollis

Rare1 obs.

Want the Complete Field Guide?

Get all 93 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.