San Geronimo

Ecosystem Overview

The San Geronimo ecosystem supports 100 documented wildlife species across 94 taxonomic genera. Located in Marin County, California, 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. This location ranks #9 for species diversity among 31 Marin County County natural areas, placing it in the 71th 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 31 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#9 of 31 locations

71th percentile for diversity

vs. Marin County

0% 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 100 total documented species.

Pickeringia montana

Very Common5 obs.

Pedicularis densiflora

Indian warrior

Very Common4 obs.

Arbutus menziesii

Pacific madrone

Very Common4 obs.

Equisetum telmateia

Great Horsetail

Very Common3 obs.

Digitalis purpurea

foxglove

Very Common3 obs.

Batrachoseps attenuatus

California Slender Salamander

Common3 obs.

Artemisia douglasiana

Douglas' wormwood

Common3 obs.

Aquilegia eximia

Common3 obs.

Rubus ursinus

California blackberry

Common3 obs.

Castilleja foliolosa

woolly Indian paintbrush

Common3 obs.

Clitocybe fragrans

Fragrant Funnel

Common3 obs.

Galerina marginata

Funeral Bell

Occasional3 obs.

Phoradendron densum

Occasional3 obs.

Hygrocybe flavescens

Occasional2 obs.

Corallorhiza maculata

Large Coralroot

Occasional2 obs.

Maianthemum stellatum

Starry False Lily Of The Valley

Occasional2 obs.

Clintonia andrewsiana

red clintonia

Occasional2 obs.

Scoliopus bigelovii

brownies

Rare2 obs.

Aspidotis densa

dense lace fern

Rare2 obs.

Lepus californicus

Black-tailed Jack Rabbit

Rare2 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 San Geronimo. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

100

Species Count

vs. Regional Average

Compared to 8 nearby locations in Marin County County, California

Nearby Natural Areas

Marin County

Importance: 0.49

100 species

0% vs. current

San Rafael

Importance: 0.46

100 species

0% vs. current

Novato

Importance: 0.45

100 species

0% vs. current

Sausalito

Importance: 0.45

100 species

0% vs. current

Mill Valley

Importance: 0.44

100 species

0% vs. current

Larkspur

Importance: 0.42

100 species

0% vs. current

San Anselmo

Importance: 0.41

100 species

0% vs. current

Tiburon

Importance: 0.39

100 species

0% 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 Marin 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

100

Species Count

vs. Regional Average

Compared to 8 nearby locations in Marin County County, California

Nearby Natural Areas

Marin County

Importance: 0.49

100 species

0% vs. current

San Rafael

Importance: 0.46

100 species

0% vs. current

Novato

Importance: 0.45

100 species

0% vs. current

Sausalito

Importance: 0.45

100 species

0% vs. current

Mill Valley

Importance: 0.44

100 species

0% vs. current

Larkspur

Importance: 0.42

100 species

0% vs. current

San Anselmo

Importance: 0.41

100 species

0% vs. current

Tiburon

Importance: 0.39

100 species

0% 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 31 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#9 of 31 locations

71th percentile for diversity

vs. Marin County

0% species diversity

Most Common Species

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

Pickeringia montana

Very Common5 obs.

Pedicularis densiflora

Indian warrior

Very Common4 obs.

Arbutus menziesii

Pacific madrone

Very Common4 obs.

Equisetum telmateia

Great Horsetail

Very Common3 obs.

Digitalis purpurea

foxglove

Very Common3 obs.

Batrachoseps attenuatus

California Slender Salamander

Common3 obs.

Artemisia douglasiana

Douglas' wormwood

Common3 obs.

Aquilegia eximia

Common3 obs.

Rubus ursinus

California blackberry

Common3 obs.

Castilleja foliolosa

woolly Indian paintbrush

Common3 obs.

Clitocybe fragrans

Fragrant Funnel

Common3 obs.

Galerina marginata

Funeral Bell

Occasional3 obs.

Phoradendron densum

Occasional3 obs.

Hygrocybe flavescens

Occasional2 obs.

Corallorhiza maculata

Large Coralroot

Occasional2 obs.

Maianthemum stellatum

Starry False Lily Of The Valley

Occasional2 obs.

Clintonia andrewsiana

red clintonia

Occasional2 obs.

Scoliopus bigelovii

brownies

Rare2 obs.

Aspidotis densa

dense lace fern

Rare2 obs.

Lepus californicus

Black-tailed Jack Rabbit

Rare2 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.