Santa Rosa Island

Ecosystem Overview

The Santa Rosa Island ecosystem supports 100 documented wildlife species across 92 taxonomic genera. Located in California, this area provides critical habitat for regional wildlife. 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 #266 for species diversity among 1359 California natural areas, placing it in the 80th 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

#266

Regional Rank

Out of 1359 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#266 of 1359 locations

80th percentile for diversity

vs. California

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.

Salvia brandegeei

Very Common25 obs.

Pseudacris regilla

Pacific chorus frog

Very Common12 obs.

Silene laciniata

Mexican-pink

Very Common12 obs.

Eriogonum arborescens

Island buckwheat

Very Common10 obs.

Bombus vosnesenskii

Vosnesensky bumble bee

Very Common9 obs.

Castilleja affinis

Common9 obs.

Lasioglossum pavonotum

Common8 obs.

Sceloporus occidentalis

Pacific blue-bellied lizard

Common8 obs.

Phacelia distans

Common7 obs.

Ariolimax stramineus

Common7 obs.

Ranunculus californicus

California buttercup

Common7 obs.

Abronia umbellata

sand-verbena

Occasional6 obs.

Pinus torreyana

Torrey pine

Occasional6 obs.

Malacothrix incana

Occasional6 obs.

Erigeron glaucus

seaside daisy

Occasional6 obs.

Eschscholzia californica

California poppy

Occasional5 obs.

Adiantum jordanii

Occasional5 obs.

Sisyrinchium bellum

Rare5 obs.

Quercus tomentella

Island Oak

Rare5 obs.

Bombus melanopygus

Black Tail Bumble Bee

Rare4 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 Santa Rosa Island. 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 California

Nearby Natural Areas

California

Importance: 0.84

100 species

0% vs. current

San Francisco

Importance: 0.69

100 species

0% vs. current

San Diego

Importance: 0.63

100 species

0% vs. current

Oakland

Importance: 0.61

100 species

0% vs. current

Fresno

Importance: 0.59

100 species

0% vs. current

Anaheim

Importance: 0.59

100 species

0% vs. current

San José

Importance: 0.59

100 species

0% vs. current

Berkeley

Importance: 0.59

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 California.

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 California

Nearby Natural Areas

California

Importance: 0.84

100 species

0% vs. current

San Francisco

Importance: 0.69

100 species

0% vs. current

San Diego

Importance: 0.63

100 species

0% vs. current

Oakland

Importance: 0.61

100 species

0% vs. current

Fresno

Importance: 0.59

100 species

0% vs. current

Anaheim

Importance: 0.59

100 species

0% vs. current

San José

Importance: 0.59

100 species

0% vs. current

Berkeley

Importance: 0.59

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

#266

Regional Rank

Out of 1359 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#266 of 1359 locations

80th percentile for diversity

vs. California

0% species diversity

Most Common Species

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

Salvia brandegeei

Very Common25 obs.

Pseudacris regilla

Pacific chorus frog

Very Common12 obs.

Silene laciniata

Mexican-pink

Very Common12 obs.

Eriogonum arborescens

Island buckwheat

Very Common10 obs.

Bombus vosnesenskii

Vosnesensky bumble bee

Very Common9 obs.

Castilleja affinis

Common9 obs.

Lasioglossum pavonotum

Common8 obs.

Sceloporus occidentalis

Pacific blue-bellied lizard

Common8 obs.

Phacelia distans

Common7 obs.

Ariolimax stramineus

Common7 obs.

Ranunculus californicus

California buttercup

Common7 obs.

Abronia umbellata

sand-verbena

Occasional6 obs.

Pinus torreyana

Torrey pine

Occasional6 obs.

Malacothrix incana

Occasional6 obs.

Erigeron glaucus

seaside daisy

Occasional6 obs.

Eschscholzia californica

California poppy

Occasional5 obs.

Adiantum jordanii

Occasional5 obs.

Sisyrinchium bellum

Rare5 obs.

Quercus tomentella

Island Oak

Rare5 obs.

Bombus melanopygus

Black Tail Bumble Bee

Rare4 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.