Mallard Lake

Ecosystem Overview

The Mallard Lake ecosystem supports 28 documented wildlife species across 27 taxonomic genera. Located in San Francisco City and 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 San Francisco nearby has 72% more documented species, Mallard Lake offers unique wildlife observation opportunities. This location ranks #10 for species diversity among 21 San Francisco City and County County natural areas, placing it in the 52th 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

#10

Regional Rank

Out of 21 locations

Species Distribution

Very Common6 species

Common9 species

Occasional8 species

Rare5 species

Regional Context

Regional Ranking

#10 of 21 locations

52th percentile for diversity

vs. San Francisco

-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.

Podilymbus podiceps

Pied-billed grebe

Very Common8 obs.

Lophodytes cucullatus

Hooded Merganser

Very Common8 obs.

Ardea herodias

Great Blue Heron

Very Common6 obs.

Nycticorax nycticorax

night heron, black-crowned night heron

Very Common5 obs.

Fulica americana

American Coot

Very Common4 obs.

Anas platyrhynchos

mallard

Common3 obs.

Megaceryle alcyon

Belted Kingfisher

Common2 obs.

Procyon lotor

raccoon, northern raccoon

Common2 obs.

Larus occidentalis

Western Gull

Common2 obs.

Ischnura cervula

Pacific Forktail

Common1 obs.

Sympetrum illotum

Cardinal Meadowhawk

Common1 obs.

Lophocampa maculata

Occasional1 obs.

Trachemys scripta

slider turtle, red-eared terrapin, red-eared slider

Occasional1 obs.

Selasphorus sasin

Allen's Hummingbird

Occasional1 obs.

Sphyrapicus ruber

Red-breasted Sapsucker

Occasional1 obs.

Buteo lineatus

Red-Shouldered/Broad-Winged Hawk

Occasional1 obs.

Sitta pygmaea

Pygmy Nuthatch

Occasional1 obs.

Poecile rufescens

Chestnut-backed Chickadee

Rare1 obs.

Geothlypis trichas

Common Yellowthroat (Arizela Group)

Rare1 obs.

Catharus guttatus

Hermit Thrush

Rare1 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 Mallard Lake. Perfect for outdoor adventures, education, and nature exploration.

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Regional Comparison

Regional Ranking

Species Count

-52%

vs. Regional Average

Compared to 8 nearby locations in San Francisco City and County County, California

Nearby Natural Areas

San Francisco

Importance: 0.69

100 species

-72% vs. current

Stow Lake

Importance: 0.35

100 species

-72% vs. current

North Lake

Importance: 0.35

75 species

-63% vs. current

Mountain Lake

Importance: 0.35

60 species

-53% vs. current

Elk Glen Lake

Importance: 0.35

54 species

-48% vs. current

Lily Pond

Importance: 0.35

30 species

-7% vs. current

Pine Lake

Importance: 0.35

22 species

+27% vs. current

Middle Lake

Importance: 0.35

21 species

+33% 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 Francisco City and 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

-52%

vs. Regional Average

Compared to 8 nearby locations in San Francisco City and County County, California

Nearby Natural Areas

San Francisco

Importance: 0.69

100 species

-72% vs. current

Stow Lake

Importance: 0.35

100 species

-72% vs. current

North Lake

Importance: 0.35

75 species

-63% vs. current

Mountain Lake

Importance: 0.35

60 species

-53% vs. current

Elk Glen Lake

Importance: 0.35

54 species

-48% vs. current

Lily Pond

Importance: 0.35

30 species

-7% vs. current

Pine Lake

Importance: 0.35

22 species

+27% vs. current

Middle Lake

Importance: 0.35

21 species

+33% 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

#10

Regional Rank

Out of 21 locations

Species Distribution

Very Common6 species

Common9 species

Occasional8 species

Rare5 species

Regional Context

Regional Ranking

#10 of 21 locations

52th percentile for diversity

vs. San Francisco

-72% species diversity

Most Common Species

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

Podilymbus podiceps

Pied-billed grebe

Very Common8 obs.

Lophodytes cucullatus

Hooded Merganser

Very Common8 obs.

Ardea herodias

Great Blue Heron

Very Common6 obs.

Nycticorax nycticorax

night heron, black-crowned night heron

Very Common5 obs.

Fulica americana

American Coot

Very Common4 obs.

Anas platyrhynchos

mallard

Common3 obs.

Megaceryle alcyon

Belted Kingfisher

Common2 obs.

Procyon lotor

raccoon, northern raccoon

Common2 obs.

Larus occidentalis

Western Gull

Common2 obs.

Ischnura cervula

Pacific Forktail

Common1 obs.

Sympetrum illotum

Cardinal Meadowhawk

Common1 obs.

Lophocampa maculata

Occasional1 obs.

Trachemys scripta

slider turtle, red-eared terrapin, red-eared slider

Occasional1 obs.

Selasphorus sasin

Allen's Hummingbird

Occasional1 obs.

Sphyrapicus ruber

Red-breasted Sapsucker

Occasional1 obs.

Buteo lineatus

Red-Shouldered/Broad-Winged Hawk

Occasional1 obs.

Sitta pygmaea

Pygmy Nuthatch

Occasional1 obs.

Poecile rufescens

Chestnut-backed Chickadee

Rare1 obs.

Geothlypis trichas

Common Yellowthroat (Arizela Group)

Rare1 obs.

Catharus guttatus

Hermit Thrush

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.