Pastorius Reservoir

Ecosystem Overview

The Pastorius Reservoir ecosystem supports 26 documented wildlife species across 19 taxonomic genera. Located in La Plata County, Colorado, 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 Durango nearby has 74% more documented species, Pastorius Reservoir offers unique wildlife observation opportunities. This location ranks #3 for species diversity among 5 La Plata County County natural areas, placing it in the 40th 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 5 locations

Species Distribution

Very Common6 species

Common8 species

Occasional7 species

Rare5 species

Regional Context

Regional Ranking

#3 of 5 locations

40th percentile for diversity

vs. Durango

-74% 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 26 total documented species.

Mareca americana

American Wigeon

Very Common4 obs.

Aythya americana

Redhead

Very Common3 obs.

Anas acuta

pintail, northern pintail

Very Common2 obs.

Fulica americana

American Coot

Very Common1 obs.

Charadrius semipalmatus

Semipalmated Plover

Very Common1 obs.

Pandion haliaetus

osprey

Common1 obs.

Falco peregrinus

peregrine falcon

Common1 obs.

Larus delawarensis

Ring-billed Gull

Common1 obs.

Tringa melanoleuca

Greater Yellowlegs

Common1 obs.

Calidris mauri

Western Sandpiper

Common1 obs.

Calidris minutilla

least sandpiper

Common1 obs.

Euphagus cyanocephalus

Brewer's blackbird

Occasional1 obs.

Aythya affinis

Lesser Scaup

Occasional1 obs.

Aythya collaris

Ring-necked Duck

Occasional1 obs.

Oxyura jamaicensis

Ruddy Duck

Occasional1 obs.

Bucephala clangula

common goldeneye

Occasional1 obs.

Bucephala albeola

Bufflehead

Occasional1 obs.

Aix sponsa

wood duck

Rare1 obs.

Branta canadensis

Canada goose

Rare1 obs.

Leucophaeus pipixcan

Franklin's Gull

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 Pastorius Reservoir. Perfect for outdoor adventures, education, and nature exploration.

$6.99

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

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$6.99

Regional Comparison

Regional Ranking

Species Count

-51%

vs. Regional Average

Compared to 4 nearby locations in La Plata County County, Colorado

Nearby Natural Areas

Durango

Importance: 0.47

100 species

-74% vs. current

La Plata County

Importance: 0.45

100 species

-74% vs. current

Bayfield

Importance: 0.27

1 species

+2500% vs. current

Haviland Lake

Importance: 0.20

11 species

+136% 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 La Plata 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

-51%

vs. Regional Average

Compared to 4 nearby locations in La Plata County County, Colorado

Nearby Natural Areas

Durango

Importance: 0.47

100 species

-74% vs. current

La Plata County

Importance: 0.45

100 species

-74% vs. current

Bayfield

Importance: 0.27

1 species

+2500% vs. current

Haviland Lake

Importance: 0.20

11 species

+136% 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 5 locations

Species Distribution

Very Common6 species

Common8 species

Occasional7 species

Rare5 species

Regional Context

Regional Ranking

#3 of 5 locations

40th percentile for diversity

vs. Durango

-74% species diversity

Most Common Species

Showing 20 most frequently observed species out of 26 total documented species.

Mareca americana

American Wigeon

Very Common4 obs.

Aythya americana

Redhead

Very Common3 obs.

Anas acuta

pintail, northern pintail

Very Common2 obs.

Fulica americana

American Coot

Very Common1 obs.

Charadrius semipalmatus

Semipalmated Plover

Very Common1 obs.

Pandion haliaetus

osprey

Common1 obs.

Falco peregrinus

peregrine falcon

Common1 obs.

Larus delawarensis

Ring-billed Gull

Common1 obs.

Tringa melanoleuca

Greater Yellowlegs

Common1 obs.

Calidris mauri

Western Sandpiper

Common1 obs.

Calidris minutilla

least sandpiper

Common1 obs.

Euphagus cyanocephalus

Brewer's blackbird

Occasional1 obs.

Aythya affinis

Lesser Scaup

Occasional1 obs.

Aythya collaris

Ring-necked Duck

Occasional1 obs.

Oxyura jamaicensis

Ruddy Duck

Occasional1 obs.

Bucephala clangula

common goldeneye

Occasional1 obs.

Bucephala albeola

Bufflehead

Occasional1 obs.

Aix sponsa

wood duck

Rare1 obs.

Branta canadensis

Canada goose

Rare1 obs.

Leucophaeus pipixcan

Franklin's Gull

Rare1 obs.

Want the Complete Field Guide?

Get all 26 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.