Jewel Lake

Ecosystem Overview

The Jewel Lake ecosystem supports 76 documented wildlife species across 70 taxonomic genera. Located in Contra Costa County, California, this area provides critical habitat with diverse natural communities. The location hosts 16 frequently observed species and 15 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While Contra Costa County nearby has 24% more documented species, Jewel Lake offers unique wildlife observation opportunities. This location ranks #12 for species diversity among 45 Contra Costa County County natural areas, placing it in the 73th 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

#12

Regional Rank

Out of 45 locations

Species Distribution

Very Common16 species

Common23 species

Occasional22 species

Rare15 species

Regional Context

Regional Ranking

#12 of 45 locations

73th percentile for diversity

vs. Contra Costa County

-24% 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 76 total documented species.

Actinemys marmorata

western pond turtle

Very Common37 obs.

Argia vivida

Vivid Dancer

Very Common12 obs.

Melospiza melodia

Song Sparrow

Very Common11 obs.

Anas platyrhynchos

mallard

Very Common11 obs.

Lithobates catesbeianus

Common Bullfrog

Very Common10 obs.

Bucephala albeola

Bufflehead

Common6 obs.

Sayornis nigricans

black phoebe

Common5 obs.

Turdus migratorius

American Robin

Common5 obs.

Setophaga townsendi

Townsend's Warbler

Common5 obs.

Sympetrum illotum

Cardinal Meadowhawk

Common4 obs.

Diabrotica undecimpunctata

Spotted Cucumber Beetle

Common3 obs.

Ardea alba

Great Egret

Occasional3 obs.

Poecile rufescens

Chestnut-backed Chickadee

Occasional3 obs.

Pseudacris regilla

Pacific chorus frog

Occasional2 obs.

Limenitis lorquini

Lorquin'S Admiral

Occasional2 obs.

Equisetum telmateia

Great Horsetail

Occasional2 obs.

Calypte anna

Anna's Hummingbird

Occasional2 obs.

Megaceryle alcyon

Belted Kingfisher

Rare2 obs.

Lontra canadensis

River Otter

Rare2 obs.

Papilio zelicaon

Western Swallowtail

Rare2 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 Jewel Lake. Perfect for outdoor adventures, education, and nature exploration.

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Regional Comparison

Regional Ranking

Species Count

-7%

vs. Regional Average

Compared to 8 nearby locations in Contra Costa County County, California

Nearby Natural Areas

Contra Costa County

Importance: 0.49

100 species

-24% vs. current

Richmond

Importance: 0.49

100 species

-24% vs. current

Concord

Importance: 0.46

100 species

-24% vs. current

Walnut Creek

Importance: 0.45

100 species

-24% vs. current

Antioch

Importance: 0.44

100 species

-24% vs. current

Moraga

Importance: 0.43

47 species

+62% vs. current

Orinda

Importance: 0.43

100 species

-24% vs. current

Pittsburg

Importance: 0.43

11 species

+591% 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 Contra Costa 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

-7%

vs. Regional Average

Compared to 8 nearby locations in Contra Costa County County, California

Nearby Natural Areas

Contra Costa County

Importance: 0.49

100 species

-24% vs. current

Richmond

Importance: 0.49

100 species

-24% vs. current

Concord

Importance: 0.46

100 species

-24% vs. current

Walnut Creek

Importance: 0.45

100 species

-24% vs. current

Antioch

Importance: 0.44

100 species

-24% vs. current

Moraga

Importance: 0.43

47 species

+62% vs. current

Orinda

Importance: 0.43

100 species

-24% vs. current

Pittsburg

Importance: 0.43

11 species

+591% 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

#12

Regional Rank

Out of 45 locations

Species Distribution

Very Common16 species

Common23 species

Occasional22 species

Rare15 species

Regional Context

Regional Ranking

#12 of 45 locations

73th percentile for diversity

vs. Contra Costa County

-24% species diversity

Most Common Species

Showing 20 most frequently observed species out of 76 total documented species.

Actinemys marmorata

western pond turtle

Very Common37 obs.

Argia vivida

Vivid Dancer

Very Common12 obs.

Melospiza melodia

Song Sparrow

Very Common11 obs.

Anas platyrhynchos

mallard

Very Common11 obs.

Lithobates catesbeianus

Common Bullfrog

Very Common10 obs.

Bucephala albeola

Bufflehead

Common6 obs.

Sayornis nigricans

black phoebe

Common5 obs.

Turdus migratorius

American Robin

Common5 obs.

Setophaga townsendi

Townsend's Warbler

Common5 obs.

Sympetrum illotum

Cardinal Meadowhawk

Common4 obs.

Diabrotica undecimpunctata

Spotted Cucumber Beetle

Common3 obs.

Ardea alba

Great Egret

Occasional3 obs.

Poecile rufescens

Chestnut-backed Chickadee

Occasional3 obs.

Pseudacris regilla

Pacific chorus frog

Occasional2 obs.

Limenitis lorquini

Lorquin'S Admiral

Occasional2 obs.

Equisetum telmateia

Great Horsetail

Occasional2 obs.

Calypte anna

Anna's Hummingbird

Occasional2 obs.

Megaceryle alcyon

Belted Kingfisher

Rare2 obs.

Lontra canadensis

River Otter

Rare2 obs.

Papilio zelicaon

Western Swallowtail

Rare2 obs.

Want the Complete Field Guide?

Get all 76 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.