San Leandro Bay

Ecosystem Overview

The San Leandro Bay ecosystem supports 100 documented wildlife species across 73 taxonomic genera. Located in Alameda 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 #15 for species diversity among 33 Alameda 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

#15

Regional Rank

Out of 33 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#15 of 33 locations

55th percentile for diversity

vs. Oakland

0% species diversity

Ecosystem Overview

‌
‌
‌
‌

Biodiversity Highlights

‌

Species Distribution

Very Common‌

Common‌

Occasional‌

Rare‌

Regional Context

Regional Ranking

‌

Most Common Species

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

Aythya marila

greater scaup

Very Common59 obs.

Tringa semipalmata

Willet

Very Common58 obs.

Bucephala clangula

common goldeneye

Very Common54 obs.

Oxyura jamaicensis

Ruddy Duck

Very Common44 obs.

Bucephala albeola

Bufflehead

Very Common43 obs.

Podiceps nigricollis

black-necked grebe

Common40 obs.

Melanitta perspicillata

Surf Scoter

Common33 obs.

Rallus obsoletus

Ridgway's Rail

Common33 obs.

Podilymbus podiceps

Pied-billed grebe

Common32 obs.

Limosa fedoa

Marbled Godwit

Common30 obs.

Larus occidentalis

Western Gull

Common30 obs.

Larus delawarensis

Ring-billed Gull

Occasional28 obs.

Podiceps auritus

horned grebe

Occasional28 obs.

Fulica americana

American Coot

Occasional24 obs.

Aythya affinis

Lesser Scaup

Occasional23 obs.

Spatula discors

Blue-winged Teal

Occasional21 obs.

Egretta thula

Snowy Egret

Occasional21 obs.

Himantopus mexicanus

Black-necked Stilt

Rare20 obs.

Recurvirostra americana

American avocet

Rare20 obs.

Larus californicus

California Gull

Rare19 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.

Most Common Species

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

Want the Complete Field Guide?

‌
‌

‌

Get Your Personalized Field Guide

Download a professional PDF field guide featuring all the species found in San Leandro Bay. Perfect for outdoor adventures, education, and nature exploration.

$6.99

Get Your Personalized Field Guide

Download a professional PDF field guide featuring all the species found in San Leandro Bay. Perfect for outdoor adventures, education, and nature exploration.

Email Address (for delivery)

Your field guide will be delivered to this email address. Please double-check for accuracy.

$6.99

Regional Comparison

Regional Ranking

100

Species Count

vs. Regional Average

Compared to 8 nearby locations in Alameda County County, California

Nearby Natural Areas

Oakland

Importance: 0.61

100 species

0% vs. current

Berkeley

Importance: 0.59

100 species

0% vs. current

Alameda County

Importance: 0.51

100 species

0% vs. current

Fremont

Importance: 0.50

100 species

0% vs. current

Hayward

Importance: 0.49

100 species

0% vs. current

Alameda

Importance: 0.48

100 species

0% vs. current

Emeryville

Importance: 0.45

100 species

0% vs. current

Pleasanton

Importance: 0.45

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 Alameda County County.

Regional Comparison

‌

Regional Ranking

‌

Species Count

‌

vs. Regional Average

‌

Nearby Natural Areas

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

‌
‌

‌

About This Comparison

‌
‌
‌

Regional Comparison

Regional Ranking

100

Species Count

vs. Regional Average

Compared to 8 nearby locations in Alameda County County, California

Nearby Natural Areas

Oakland

Importance: 0.61

100 species

0% vs. current

Berkeley

Importance: 0.59

100 species

0% vs. current

Alameda County

Importance: 0.51

100 species

0% vs. current

Fremont

Importance: 0.50

100 species

0% vs. current

Hayward

Importance: 0.49

100 species

0% vs. current

Alameda

Importance: 0.48

100 species

0% vs. current

Emeryville

Importance: 0.45

100 species

0% vs. current

Pleasanton

Importance: 0.45

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

#15

Regional Rank

Out of 33 locations

Species Distribution

Very Common21 species

Common30 species

Occasional30 species

Rare19 species

Regional Context

Regional Ranking

#15 of 33 locations

55th percentile for diversity

vs. Oakland

0% species diversity

Most Common Species

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

Aythya marila

greater scaup

Very Common59 obs.

Tringa semipalmata

Willet

Very Common58 obs.

Bucephala clangula

common goldeneye

Very Common54 obs.

Oxyura jamaicensis

Ruddy Duck

Very Common44 obs.

Bucephala albeola

Bufflehead

Very Common43 obs.

Podiceps nigricollis

black-necked grebe

Common40 obs.

Melanitta perspicillata

Surf Scoter

Common33 obs.

Rallus obsoletus

Ridgway's Rail

Common33 obs.

Podilymbus podiceps

Pied-billed grebe

Common32 obs.

Limosa fedoa

Marbled Godwit

Common30 obs.

Larus occidentalis

Western Gull

Common30 obs.

Larus delawarensis

Ring-billed Gull

Occasional28 obs.

Podiceps auritus

horned grebe

Occasional28 obs.

Fulica americana

American Coot

Occasional24 obs.

Aythya affinis

Lesser Scaup

Occasional23 obs.

Spatula discors

Blue-winged Teal

Occasional21 obs.

Egretta thula

Snowy Egret

Occasional21 obs.

Himantopus mexicanus

Black-necked Stilt

Rare20 obs.

Recurvirostra americana

American avocet

Rare20 obs.

Larus californicus

California Gull

Rare19 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.