Marin County

Ecosystem Overview

The Marin County ecosystem supports 100 documented wildlife species across 95 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 #5 for species diversity among 31 Marin County County natural areas, placing it in the 84th 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

#5 of 31 locations

84th percentile for diversity

vs. San Rafael

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.

Taricha torosa

California Newt

Very Common1,303 obs.

Sceloporus occidentalis

Pacific blue-bellied lizard

Very Common410 obs.

Eschscholzia californica

California poppy

Very Common347 obs.

Diplacus aurantiacus

orange bush monkey-flower

Very Common344 obs.

Cardamine californica

Very Common340 obs.

Sisyrinchium bellum

Common329 obs.

Sidalcea malviflora

Greek Mallow

Common288 obs.

Ariolimax buttoni

Common282 obs.

Toxicodendron diversilobum

poison oak

Common281 obs.

Batrachoseps attenuatus

California Slender Salamander

Common271 obs.

Triteleia laxa

Ithuriel's-spear

Common255 obs.

Umbellularia californica

Bay Laurel

Occasional233 obs.

Polystichum munitum

western sword fern

Occasional229 obs.

Zonotrichia leucophrys

white-crowned sparrow

Occasional218 obs.

Baccharis pilularis

coyotebrush

Occasional218 obs.

Taricha granulosa

Rough-skinned Newt

Occasional212 obs.

Iris douglasiana

Douglas iris

Occasional210 obs.

Ranunculus californicus

California buttercup

Rare203 obs.

Callipepla californica

California Quail

Rare194 obs.

Lonicera hispidula

Rare187 obs.

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Most Common Species

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Get Your Personalized Field Guide

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

$6.99

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Regional Comparison

Regional Ranking

100

Species Count

+14%

vs. Regional Average

Compared to 8 nearby locations in Marin County County, California

Nearby Natural Areas

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

Tomales

Importance: 0.36

1 species

+9900% 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

+14%

vs. Regional Average

Compared to 8 nearby locations in Marin County County, California

Nearby Natural Areas

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

Tomales

Importance: 0.36

1 species

+9900% 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

#5 of 31 locations

84th percentile for diversity

vs. San Rafael

0% species diversity

Most Common Species

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

Taricha torosa

California Newt

Very Common1,303 obs.

Sceloporus occidentalis

Pacific blue-bellied lizard

Very Common410 obs.

Eschscholzia californica

California poppy

Very Common347 obs.

Diplacus aurantiacus

orange bush monkey-flower

Very Common344 obs.

Cardamine californica

Very Common340 obs.

Sisyrinchium bellum

Common329 obs.

Sidalcea malviflora

Greek Mallow

Common288 obs.

Ariolimax buttoni

Common282 obs.

Toxicodendron diversilobum

poison oak

Common281 obs.

Batrachoseps attenuatus

California Slender Salamander

Common271 obs.

Triteleia laxa

Ithuriel's-spear

Common255 obs.

Umbellularia californica

Bay Laurel

Occasional233 obs.

Polystichum munitum

western sword fern

Occasional229 obs.

Zonotrichia leucophrys

white-crowned sparrow

Occasional218 obs.

Baccharis pilularis

coyotebrush

Occasional218 obs.

Taricha granulosa

Rough-skinned Newt

Occasional212 obs.

Iris douglasiana

Douglas iris

Occasional210 obs.

Ranunculus californicus

California buttercup

Rare203 obs.

Callipepla californica

California Quail

Rare194 obs.

Lonicera hispidula

Rare187 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.