Angwin

Ecosystem Overview

The Angwin ecosystem supports 28 documented wildlife species across 28 taxonomic genera. Located in Napa County, California, this area provides critical habitat with diverse natural communities. The location hosts 6 frequently observed species and 5 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While Napa nearby has 72% more documented species, Angwin offers unique wildlife observation opportunities. This location ranks #4 for species diversity among 7 Napa County County natural areas, placing it in the 43th 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

Regional Rank

Out of 7 locations

Species Distribution

Very Common6 species

Common9 species

Occasional8 species

Rare5 species

Regional Context

Regional Ranking

#4 of 7 locations

43th percentile for diversity

vs. Napa

-72% 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 28 total documented species.

Apis mellifera

Western Honey Bee

Very Common2 obs.

Latrodectus hesperus

Very Common2 obs.

Arbutus menziesii

Pacific madrone

Very Common2 obs.

Heteromeles arbutifolia

Toyon

Very Common2 obs.

Uroctonus mordax

Very Common2 obs.

Junco hyemalis

dark-eyed junco

Common2 obs.

Rosalia funebris

Common1 obs.

Steatoda nobilis

Common1 obs.

Sceloporus occidentalis

Pacific blue-bellied lizard

Common1 obs.

Trametes versicolor

Turkeytail

Common1 obs.

Stereum hirsutum

Hairy Curtain Crust

Common1 obs.

Pseudotsuga menziesii

Oregon Pine

Occasional1 obs.

Briza maxima

Big quakinggrass

Occasional1 obs.

Calochortus amabilis

Occasional1 obs.

Pyrola aphylla

leafless wintergreen

Occasional1 obs.

Hypochaeris radicata

Flat Weed

Occasional1 obs.

Annulohypoxylon thouarsianum

Occasional1 obs.

Coccinella septempunctata

7-spot ladybird

Rare1 obs.

Limenitis lorquini

Lorquin'S Admiral

Rare1 obs.

Argiope aurantia

Yellow Garden Spider

Rare1 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 Angwin. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

Species Count

-35%

vs. Regional Average

Compared to 6 nearby locations in Napa County County, California

Nearby Natural Areas

Napa

Importance: 0.48

100 species

-72% vs. current

Napa County

Importance: 0.47

100 species

-72% vs. current

Lake Berryessa

Importance: 0.40

22 species

+27% vs. current

Indian Island

Importance: 0.33

1 species

+2700% vs. current

Deer Park

Importance: 0.30

1 species

+2700% vs. current

Lake Hennessey

Importance: 0.20

34 species

-18% 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 Napa 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

-35%

vs. Regional Average

Compared to 6 nearby locations in Napa County County, California

Nearby Natural Areas

Napa

Importance: 0.48

100 species

-72% vs. current

Napa County

Importance: 0.47

100 species

-72% vs. current

Lake Berryessa

Importance: 0.40

22 species

+27% vs. current

Indian Island

Importance: 0.33

1 species

+2700% vs. current

Deer Park

Importance: 0.30

1 species

+2700% vs. current

Lake Hennessey

Importance: 0.20

34 species

-18% 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

Regional Rank

Out of 7 locations

Species Distribution

Very Common6 species

Common9 species

Occasional8 species

Rare5 species

Regional Context

Regional Ranking

#4 of 7 locations

43th percentile for diversity

vs. Napa

-72% species diversity

Most Common Species

Showing 20 most frequently observed species out of 28 total documented species.

Apis mellifera

Western Honey Bee

Very Common2 obs.

Latrodectus hesperus

Very Common2 obs.

Arbutus menziesii

Pacific madrone

Very Common2 obs.

Heteromeles arbutifolia

Toyon

Very Common2 obs.

Uroctonus mordax

Very Common2 obs.

Junco hyemalis

dark-eyed junco

Common2 obs.

Rosalia funebris

Common1 obs.

Steatoda nobilis

Common1 obs.

Sceloporus occidentalis

Pacific blue-bellied lizard

Common1 obs.

Trametes versicolor

Turkeytail

Common1 obs.

Stereum hirsutum

Hairy Curtain Crust

Common1 obs.

Pseudotsuga menziesii

Oregon Pine

Occasional1 obs.

Briza maxima

Big quakinggrass

Occasional1 obs.

Calochortus amabilis

Occasional1 obs.

Pyrola aphylla

leafless wintergreen

Occasional1 obs.

Hypochaeris radicata

Flat Weed

Occasional1 obs.

Annulohypoxylon thouarsianum

Occasional1 obs.

Coccinella septempunctata

7-spot ladybird

Rare1 obs.

Limenitis lorquini

Lorquin'S Admiral

Rare1 obs.

Argiope aurantia

Yellow Garden Spider

Rare1 obs.

Want the Complete Field Guide?

Get all 28 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.