Ross

Ecosystem Overview

The Ross ecosystem supports 100 documented wildlife species across 96 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 #14 for species diversity among 31 Marin County County natural areas, placing it in the 55th 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

#14

Regional Rank

Out of 31 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#14 of 31 locations

55th 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.

Sceloporus occidentalis

Pacific blue-bellied lizard

Very Common10 obs.

Umbellularia californica

Bay Laurel

Very Common6 obs.

Arbutus menziesii

Pacific madrone

Very Common6 obs.

Myosotis latifolia

Very Common5 obs.

Boisea rubrolineata

Very Common4 obs.

Toxicodendron diversilobum

poison oak

Common4 obs.

Apis mellifera

Western Honey Bee

Common4 obs.

Rhinotropis californica

Common4 obs.

Cardamine californica

Common4 obs.

Notholithocarpus densiflorus

tan-oak

Common3 obs.

Scrophularia californica

California figwort

Common3 obs.

Cyperus eragrostis

Pale galingale, Tall flatsedge

Occasional3 obs.

Ariolimax buttoni

Occasional3 obs.

Danaus plexippus

monarch

Occasional3 obs.

Genista monspessulana

French broom

Occasional3 obs.

Iris douglasiana

Douglas iris

Occasional3 obs.

Pentagramma triangularis

goldenback fern

Occasional3 obs.

Hylephila phyleus

Fiery Skipper

Rare3 obs.

Sequoia sempervirens

coast redwood

Rare3 obs.

Aneides lugubris

Arboreal salamander

Rare3 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 Ross. Perfect for outdoor adventures, education, and nature exploration.

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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

#14

Regional Rank

Out of 31 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#14 of 31 locations

55th percentile for diversity

vs. Marin County

0% species diversity

Most Common Species

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

Sceloporus occidentalis

Pacific blue-bellied lizard

Very Common10 obs.

Umbellularia californica

Bay Laurel

Very Common6 obs.

Arbutus menziesii

Pacific madrone

Very Common6 obs.

Myosotis latifolia

Very Common5 obs.

Boisea rubrolineata

Very Common4 obs.

Toxicodendron diversilobum

poison oak

Common4 obs.

Apis mellifera

Western Honey Bee

Common4 obs.

Rhinotropis californica

Common4 obs.

Cardamine californica

Common4 obs.

Notholithocarpus densiflorus

tan-oak

Common3 obs.

Scrophularia californica

California figwort

Common3 obs.

Cyperus eragrostis

Pale galingale, Tall flatsedge

Occasional3 obs.

Ariolimax buttoni

Occasional3 obs.

Danaus plexippus

monarch

Occasional3 obs.

Genista monspessulana

French broom

Occasional3 obs.

Iris douglasiana

Douglas iris

Occasional3 obs.

Pentagramma triangularis

goldenback fern

Occasional3 obs.

Hylephila phyleus

Fiery Skipper

Rare3 obs.

Sequoia sempervirens

coast redwood

Rare3 obs.

Aneides lugubris

Arboreal salamander

Rare3 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.