El Cajon

Ecosystem Overview

The El Cajon ecosystem supports 88 documented wildlife species across 83 taxonomic genera. Located in San Diego County, California, this area provides critical habitat with diverse natural communities. The location hosts 18 frequently observed species and 17 occasionally documented species, creating a balanced ecosystem with both resident and visiting wildlife. While San Diego nearby has 12% more documented species, El Cajon offers unique wildlife observation opportunities. This location ranks #21 for species diversity among 89 San Diego County County natural areas, placing it in the 76th 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

#21

Regional Rank

Out of 89 locations

Species Distribution

Very Common18 species

Common27 species

Occasional26 species

Rare17 species

Regional Context

Regional Ranking

#21 of 89 locations

76th percentile for diversity

vs. San Diego

-12% 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 88 total documented species.

Buteo jamaicensis

Red-tailed Hawk

Very Common16 obs.

Corvus brachyrhynchos

American Crow

Very Common7 obs.

Passer domesticus

House Sparrow

Very Common6 obs.

Larus occidentalis

Western Gull

Very Common4 obs.

Hylephila phyleus

Fiery Skipper

Very Common4 obs.

Zenaida macroura

Mourning Dove

Common4 obs.

Calypte anna

Anna's Hummingbird

Common4 obs.

Buteo lineatus

Red-Shouldered/Broad-Winged Hawk

Common3 obs.

Haemorhous mexicanus

House Finch

Common3 obs.

Sairocarpus nuttallianus

Common3 obs.

Salvia mellifera

black sage

Common3 obs.

Sayornis nigricans

black phoebe

Occasional3 obs.

Sialia mexicana

Western Bluebird

Occasional2 obs.

Falco peregrinus

peregrine falcon

Occasional2 obs.

Euphorbia peplus

petty spurge

Occasional2 obs.

Hooveria parviflora

Occasional2 obs.

Tyrannus vociferans

Cassin's Kingbird

Occasional2 obs.

Stylocline gnaphaloides

everlasting nest-straw

Rare2 obs.

Jadera haematoloma

Rare2 obs.

Cotinis mutabilis

Figeater beetle

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 El Cajon. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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Regional Comparison

Regional Ranking

Species Count

-12%

vs. Regional Average

Compared to 8 nearby locations in San Diego County County, California

Nearby Natural Areas

San Diego

Importance: 0.63

100 species

-12% vs. current

San Diego County

Importance: 0.55

100 species

-12% vs. current

Carlsbad

Importance: 0.47

100 species

-12% vs. current

Oceanside

Importance: 0.46

100 species

-12% vs. current

Escondido

Importance: 0.45

100 species

-12% vs. current

Chula Vista

Importance: 0.45

100 species

-12% vs. current

San Marcos

Importance: 0.44

100 species

-12% vs. current

Coronado

Importance: 0.42

100 species

-12% 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 San Diego 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

-12%

vs. Regional Average

Compared to 8 nearby locations in San Diego County County, California

Nearby Natural Areas

San Diego

Importance: 0.63

100 species

-12% vs. current

San Diego County

Importance: 0.55

100 species

-12% vs. current

Carlsbad

Importance: 0.47

100 species

-12% vs. current

Oceanside

Importance: 0.46

100 species

-12% vs. current

Escondido

Importance: 0.45

100 species

-12% vs. current

Chula Vista

Importance: 0.45

100 species

-12% vs. current

San Marcos

Importance: 0.44

100 species

-12% vs. current

Coronado

Importance: 0.42

100 species

-12% 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

#21

Regional Rank

Out of 89 locations

Species Distribution

Very Common18 species

Common27 species

Occasional26 species

Rare17 species

Regional Context

Regional Ranking

#21 of 89 locations

76th percentile for diversity

vs. San Diego

-12% species diversity

Most Common Species

Showing 20 most frequently observed species out of 88 total documented species.

Buteo jamaicensis

Red-tailed Hawk

Very Common16 obs.

Corvus brachyrhynchos

American Crow

Very Common7 obs.

Passer domesticus

House Sparrow

Very Common6 obs.

Larus occidentalis

Western Gull

Very Common4 obs.

Hylephila phyleus

Fiery Skipper

Very Common4 obs.

Zenaida macroura

Mourning Dove

Common4 obs.

Calypte anna

Anna's Hummingbird

Common4 obs.

Buteo lineatus

Red-Shouldered/Broad-Winged Hawk

Common3 obs.

Haemorhous mexicanus

House Finch

Common3 obs.

Sairocarpus nuttallianus

Common3 obs.

Salvia mellifera

black sage

Common3 obs.

Sayornis nigricans

black phoebe

Occasional3 obs.

Sialia mexicana

Western Bluebird

Occasional2 obs.

Falco peregrinus

peregrine falcon

Occasional2 obs.

Euphorbia peplus

petty spurge

Occasional2 obs.

Hooveria parviflora

Occasional2 obs.

Tyrannus vociferans

Cassin's Kingbird

Occasional2 obs.

Stylocline gnaphaloides

everlasting nest-straw

Rare2 obs.

Jadera haematoloma

Rare2 obs.

Cotinis mutabilis

Figeater beetle

Rare1 obs.

Want the Complete Field Guide?

Get all 88 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.