● portfotolio ● albums of Alan Cressler

North West Georgia Development

Florida, December 2024-January 2025

Opiliones (Harvestmen)

Texas, November 2024

Prehistoric Art, Lamprey Cave, Alabama

Ocmulgee River, Georgia

The Nature Conservancy, Conasauga River Basin, November 4-6, 2024

Sweetwater Creek State Park, Georgia

Airports

Alabama, Florida, Georgia, July 2024

Alan Cressler

Algae and Diatoms, Freshwater and Marine

Alligators and Crocodiles

Alpine Lakes Wilderness, Washington

Altamaha River Area, Georgia

Animal Tracks

Anchialine Pools, Hawaii

Apalachicola, Chattahoochee, and Flint Rivers Basin

Apalachicola National Forest, Florida

Appalachian Mountain Balds and Outcrops

Appalachian Plateau Sandstone Outcrops

Aquatic Insects and Larvae

Aquatic Plants

Arabia Mountain National Heritage Area, Dekalb County, Georgia

Arabia Mountain Exfoliation Explosion, July 2023

Archaeology

Arches National Park, Utah

Architecture

Arizona

Arizona Winter 2004

Arizona, November 2018

Arizona, May 2019

Arizona, December 2019

Asclepias (Milkweeds)

Asplenium scolopendrium var. americanum

Asplenium species and Hybrids

Atlanta Area Floods, September 2009

Atlanta Botanical Garden

Atlanta, Gentrification and Decay

Bacteria and Cyanobacteria

Badlands National Park, South Dakota

Battelle, Alabama

Beaches

Bears Ears National Monument, Utah

Bench Marks

Big Bend National Park, Texas

Big Bend Ranch State Park, Texas

Big Cypress National Preserve, Florida

Biodiversity, Chattahoochee River System, Georgia and Alabama

Biodiversity, Chesatee River System, Georgia

Biodiversity, Collins River System, Tennessee

Biodiversity, Conasauga River System, Georgia and Tennessee

Biodiversity, Coosa River System

Biodiversity, Etowah River System, Georgia

Biodiversity, Hiwassee River System, Tennessee and Georgia

Biodiversity, Little River System, Tennessee and Georgia

Biodiversity, Ocmulgee River Drainage, Georgia

Biodiversity, Oostanaula River System, Georgia

Biodiversity, South Chickamauga Creek Drainage

Biodiversity, Tellico River System, Tennessee

Biodiversity, Tennessee River System

Birds

Blacks Bluff Preserve, The Nature Conservancy

Black Canyon of the Gunnison National Park, Colorado

Black Hills, South Dakota

Boats and Ships

Blue Ridge Parkway

Bromeliads

Broxton Rocks Preserve, The Nature Conservancy

Buck Creek Dunite Barrens, North Carolina

California

Camp Meeting Rock Preserve, The Nature Conservancy

Canyons

Carnivorous Plants

Carolina Bays

Cataract Bogs, Blue Ridge Escarpment

Caves, Alabama

Caves, Arizona

Caves, Biota

Caves, Biota, Georgia

Caves, Obligate Biota, United States

Caves, China

Caves, Colorado

Caves, Florida

Caves, Georgia

Caves, Haiti

Caves, Hawaii

Caves, Indiana

Caves, Kentucky

Caves, Lava

Caves, Malaysia

Caves, New York

Caves, New Zealand

Caves, North Carolina

Caves, Puerto Rico

Caves, South Carolina

Caves, Tennessee

Caves, Texas

Caves, Unnamed 62, Smoked Artwork

Caves, Vermont

Caves, Virginia

Caves, Washington

Cedar Mountain, Douglas County, Georgia

Cemeteries and Headstones

Chattahoochee River National Recreation Area, Georgia

Chattahoochee National Forest Wilderness

Cherokee Syllabary

Chihuly

China January 2008

Cities and Towns

Clematis Species

Coastal Issues of the Southern United States

Coastal Plain Sandstone Outcrops

Colorado River

Conasauga River, Georgia DNR Mussel Survey, August 6, 2024

Conasauga River, Georgia DNR Mussel Survey, August 27-29, 2024

Congaree National Park, South Carolina

Coosa Valley Prairies and Woodlands, Georgia and Alabama

Coral Reefs

Costa Rica, November 2017

Covered Bridges

Crater Lake National Park, Oregon

Crayfish of The Southeast

Crustaceans

Cumberland Island National Seashore, Georgia

Cumberland Plateau

Cumberland Trail State Park, Tennessee

Cumulonimbus

Dams and Diversion Structures

Deer Cave System, Gunung Mulu National Park, Sarawak, Malaysia

Deserts

Devils Tower National Monument, Wyoming

Dinosaur Trackways

Doerun Natural Area, Georgia

Dog River Flood and Recovery

Dolan Falls Preserve, The Nature Conservancy, Texas, 2019

Dolan Falls Preserve, The Nature Conservancy, Texas

Dolan Falls Preserve, The Nature Conservancy, Texas 2018

Drone Photography

Dry Tortugas National Park

Easter Plantation, Georgia

Enchanted Rock State Natural Area, Texas

Endemic Plants, South Florida

Ephemeral ponds (Vernal Pools)

Erosion

Etowah River Basin, Georgia

Everglades National Park, Florida

Explore

Fakahatchee Strand Preserve State Park, Florida

Federally Listed Endangered and Threatened Species

Ferne Clyffe State Park, Illinois

Ferns and Fern Allies, (Pteridophytes)

Ferns of Miami-Dade County, Florida

Fire and Prescribed Burns

Fish

Fishes of Georgia

Fishes of the Southeastern United States

Flat Rock Cedar Glades and Barrens State Natural Area, Tennessee

Flickr Book 1

Flickr Book 2

Flickr Book 3

Flickr Book 4

Floods And High Water

Florida Keys

Florida, October 2007

Florida, November 2007

Florida, December 2007

Florida, February 2008

Florida, August 2008

Florida, November 2008

Florida, December 2008

Florida, December 2010

Florida, December 2022

Florida, February 2024

Florida and South Carolina, March 2023

Florida Tree Snails

Forest, Trees, and Shrubs

Foster Brady Farm, Walton County, Georgia

Francis Marion National Forest, South Carolina

Freshwater Bryozoan

Freshwater Mussels Of The U.S.

Frogs And Toads of North America

Frogs and Toads of the World

From the Air

Fruit and Seeds

Fungi

Gabbro Wet Forest, Jasper County, Georgia

Galls on Plants

Galveston Island November 2007

Geology, Fossils, and Minerals

Gastropods, Freshwater Aquatic, United States

Gastropods, Land, United States

Georgia Botanical Society, 2010 Wildflower Pilgrimage

Georgia Coast

Georgia's Legally Protected Plants

Georgia Scenes

Giant Springs, Giant Springs State Park, Montana

Glaciers

Glades, Prairies, Balds, Savannas, and Rock Outcrops

Grand Staircase-Escalante National Monument, Utah

Great Basin National Park, Nevada

Great Salt Lake, Utah

Great Smoky Mountains National Park, Tennessee and North Carolina

Green Swamp, North Carolina

Guest Photographers

Gunung Mulu National Park, Sarawak, Malaysia

Haiti, January 2015

Hawaii, December 2011

Hawaii May 2008

Hawaiian Native and Naturalized Flora

Hawaii Volcanoes National Park, Hawaii

Hawaii, Winter 2005

Hawaii, Winter 2011

Heggies Rock, The Nature Conservancy Preserve, Georgia

Hexastylis (Asarum) species

Historic

Horseshoe Crabs

Human Blight

Hurricane Creek Valley, Jackson County, Alabama

Ice and Snow

Industry And Farming

Insects

Invasive Species

Isla de Mona, Puerto Rico

Isopods and Amphipods

Jekyll Island, Georgia

Karst Depression Wetlands

Ketona Dolomite Glades, The Nature Conservancy

Lakes and Wetlands

Lambir Hills National Park, Sarawak, Malaysia

Land Gastropods of the Southeast U.S.

Leaves and Foliage

Letchworth State Park, New York

Lichens

Limestone Cedar Glades

Limestone Flat Rock Outcrops

Little Cahaba River Paddle, Alabama, May 25, 2024

Little River Canyon National Preserve, Alabama

Lizards

Logan Canyon Utah

Lost Maples State Natural Area, Texas

Lula Lake Land Trust, Georgia

Lunar Eclipse, January 20, 2019, Atlanta, Georgia

Malaysia Summer 2006

Mammals

Manitou Cave, Alabama

Marion O. Smith, Died November 30, 2022

Millipedes and Centipedes

Mollusks

Moon

Moore-Booth Cemetery, Elbert County, Georgia

Mosses, Liverworts, and Hornworts (Bryophytes)

Mountains

Mountain Biking

Mountain Bogs, Fens, Savannas

Mount Rainier National Park

Mural Art, Colquitt, Georgia

Mussels of the Paint Rock River, Alabama

My Garden

Myxomycetes

Natural Bridges and Arches

Natural Bridges National Monument, Utah

National Water

Navajo Nation Lands, New Mexico and Arizona

Nepenthes Species, Sarawak, Malaysia

Nesticus Spiders

Neversink, Alabama

New Mexico/Texas December 2016-January 2017

New Mexico and Texas Fall 2005

Newswave - DOI

New Zealand Birds

New Zealand

New Zealand Fauna

New Zealand Ferns and Fern Allies

New Zealand Flora

Niagara Falls (Horseshoe and American)

Niah National Park, Sarawak, Malaysia

Night Time

NSS Convention Indiana 2007

NSS Convention 2011, Colorado and Utah

Ocean and Bays

Ohoopee Dunes Wildlife Management Area, Georgia

Okefenokee Swamp April 2008

Old Stone Fort State Park, Tennessee

Olympic National Park, Washington

Orchids

Orchids of Gunung Mulu National Park, Sarawak, Malaysia

Organ Pipe Cactus National Monument, Arizona

Paint Rock River, Mussel Survey, and Reintroduction Trip, Alabama, September 3-5, 2024

Palms and Cycads

Parasites

Park Mammoth, Kentucky

Passiflora

People and Events

Pictured Rocks National Lakeshore, Michigan

Piedmont Granite Outcrops

Piedmont Habitats

Pigeon Mountain, Walker County, Georgia

Polk County Bog, Tennessee

Prairie Grove Glades, Lawrence County, Alabama

Prehistoric, Archaic Stone Bowl Industry

Prehistoric Art, Art Bluff, Alabama

Prehistoric, Bedrock and Boulder Mortars

Prehistoric Cupules, Chattahoochee River Valley, Georgia

Prehistoric Cupules, Etowah River Valley, Georgia

Prehistoric Cupules, Hiwassee River Valley, North Carolina

Prehistoric Cupules, Pumpkinvine Creek Valley, Georgia

Prehistoric Cupules,Tuckasegee River Valley, North Carolina

Prehistoric Cupules, Tugaloo River Valley, Georgia

Prehistoric, Fish Weirs and Dams

Prehistoric, Georgia

Prehistoric, Human Bare Foot Prints

Prehistoric, Mounds

Prehistoric, Hawaii

Prehistoric, Kentucky

Prehistoric, Ruins of the Southwest

Prehistoric, South Carolina

Prehistoric Art, Alabama

Prehistoric Art, Arizona

Prehistoric Art, Caves

Prehistoric Art, Colorado

Prehistoric Art, Darrell Pictograph Shelter, Alabama

Prehistoric Art, Florida

Prehistoric Art, Frenchman's Pictograph Complex, Alabama

Prehistoric Art, Georgia

Prehistoric Art, Grundy Shelter, Kentucky

Prehistoric Art, Indiana

Prehistoric Art, Hawaii

Prehistoric Art, Jerry Demps Cave, Tennessee

Prehistoric Art, Kentucky

Prehistoric Art, Beaver Cave, Tennessee

Prehistoric Art, Mecca Cave, Tennessee

Prehistoric Art, Montana

Prehistoric Art, Morning House, Kentucky

Prehistoric Art, Nevada

Prehistoric Art, New Mexico

Prehistoric Art, New Zealand

Prehistoric Art, Nine Mile Canyon, Utah

Prehistoric Art, North Carolina

Prehistoric Art, Open Sites

Prehistoric Art, Pennsylvania

Prehistoric Art, Picture Cave, Missouri

Prehistoric Art, Picture Cave, Missouri 2021

Prehistoric Art, Picture Cave No. 2, Missouri 2021

Prehistoric Art, Rock Bluff, Tennessee

Prehistoric Art, Sewanee Style

Prehistoric Art, Sinkhole Hollow Cave, Tennessee

Prehistoric Art, South Carolina

Prehistoric Art, Southeast U.S.

Prehistoric Art, Taino

Prehistoric Art, Tennessee

Prehistoric Art, Texas

Prehistoric Art, Turkey Cave

Prehistoric Art, Utah

Prehistoric Art, Virginia

Prehistoric Art, Washington

Prehistoric Art, West Virginia

Prehistoric Art, Wyoming

Prehistoric Art, 12th Unnamed Cave

Prehistoric Art, 11th Unnamed Cave

Prehistoric Art, 19th Unnamed Cave

Prehistoric Art, 60th Unnamed Cave

Puerto Rico

Puerto Rico, November 2008

Puerto Rico Summer 2005

Puerto Rico Winter 2005

Rio Grande-Rio Bravo del Norte, Rio Grande Wild and Scenic River-Monumento Natural Río Bravo del Norte, Brewster County, Texas and Coahuila, Mexico

Rivers And Streams, Alabama

Rivers and Streams, Colorado

Rivers And Streams, Florida

Rivers And Streams, Georgia

Rivers and Streams, Hawaii

Rivers and Streams, Kentucky

Rivers and Streams, Louisiana

Rivers and Streams, Maryland

Rivers and Streams, Nevada

Rivers and Streams, New York

Rivers and Streams, New Zealand

Rivers And Streams, North Carolina

Rivers and Streams, Oregon

Rivers and Streams, Pennsylvania

Rivers and Streams, South Carolina

Rivers And Streams, Tennessee

Rivers and Streams, Texas

Rivers and Streams, Virginia

Rivers and Streams, Utah

Rivers and Streams, West Virginia

Rivers and Streams, Washington

Rivers and Streams, Wisconsin

River Scour Habitats

River Snorkeling

Roan Mountain and Highlands, North Carolina and Tennessee

Robust Redhorse Project

Rock Piles and Rock Walls

Rocky Mountain National Park, Colorado

Salamanders

Sarawak, Malaysia 2009

Scorpions

Scorpion Cave, Georgia

Sea Creatures

SELC Instagram

Sharp-Bingham Trip, April 18, 2021

Shenandoah National Park

Signs

Snakes

Southern Appalachian High Altitude Ecosystems

Southern Appalachian Serpentine Barrens

Southern Visions

Space Shuttle Atlantis Lauch July 8, 2011

Spiders and Spider Relatives

Springs, Alabama

Springs, Blue Spring, Georgia

Springs, Florida

Springs, Georgia

Springs, Kentucky

Springs, Montana

Springs, Nevada

Springs, Tennessee

Springs, Texas

Springs, Utah

Steamboat Geyser, Yellowstone National Park

Stevens Creek Heritage Preserve, South Carolina

St. Marks National Wildlife Refuge, Florida

Stone Mountain Park, Georgia

Storms and Clouds

Street Art

Succulents

Sun

Sunset and Sunrise

Swamps and Wetlands, Alabama

Swamps and Wetlands, Florida

Swamps and Wetlands, Georgia

Swamps and Wetlands, Mississippi

Swamps and Wetlands, North Carolina

Swamps and Wetlands, South Carolina

Swamps and Wetlands, Tennessee

Tallulah Gorge, Georgia

Taylor Ridge Shale Glades, Georgia

Texas, April 2022

Texas Fall 2006

Texas, November 2021

The Film Days (Scans)

The Nature Conservancy, Alabama

The Nature Conservancy, Alabama 2020

The Nature Conservancy, Coosa Basin, Georgia, July 17-19, 2024

The Nature Conservancy, Georgia

The Nature Conservancy, Paddle Trip, 05/23/2024

The Nature Conservancy Preserves

The Nature Conservancy, Quarterly Board Meeting, September 10-13, 2024, Cabin Bluff, Georgia

Things are Changing

Trillium Species of the Southeastern U.S.

Tropical Hardwood Hammocks, Florida

Turtles

Underwater Photography

U.S. Geological Survey

U.S.G.S. in Action

U.S.G.S Amphibian Research, St. Marks National Wildlife Refuge, Florida

U.S. Geological Survey, Bsal Sampling

U.S.G.S. Chytrid Sampling, Cabaha National Wildlife Refuges, Alabama, April 2009

U.S. Geological Survey, eDNA Sampling, Colorado and Utah, August 2023

U.S. Geological Survey, eDNA Sampling, Summer 2022

U.S. Geological Survey, Eglin Air Force Base, Groundwater Sampling

U.S.G.S. Chytrid Sampling, Great Smoky Mountains National Park, Tennessee, July 2008

U.S.G.S. Chytrid Sampling, Great Smoky Mountains National Park, Tennessee, June 2009

U.S. Geological Survey, Lake Lanier Bed Coring Project

U.S. Geological Survey, Lake Okeechobee Sediment Project

U.S.G.S. Chytrid Sampling, St. Marks National Wildlife Refuge, Florida, April 2008

U.S.G.S. Chytrid Sampling, St. Marks National Wildlife Refuge, December 2008

U.S.G.S. Chytrid Sampling, St. Marks National Wildlife Refuge, April 2010

U.S. Geological Survey, CSQA, Team Zinfandel

U.S.G.S. Display

U.S. Geological Survey, Distributed Temperature Sensing (DTS) Project, Bayou Grande, Florida

U.S.G.S Ecology Training 2014

U.S. Geological Survey, South Fork Peachtree Creek, Sediment Project

U.S. Geological Survey, Streamgaging

U.S.G.S. EUSE, Baltimore/Annapolis, Maryland

U.S.G.S EUSE, Dallas, Texas

U.S.G.S EUSE, Effects of Urbanization on Stream Ecosystems

U.S.G.S. EUSE, Milwaukee, Wisconsin

U.S. Geological Survey, PNSQA Sampling

U.S.G.S. EUSE Portland, Oregon

U.S.G.S. EUSE, Raleigh, North Carolina

U.S.G.S. EUSE, Salt Lake City, Utah

U.S. Geological Survey, NESQA Sampling

U.S. Geological Survey, SCDOT Culvert Project

U.S. Geological Survey, SESQA ECO Sampling

U.S. Geological Survey, SESQA Mountianeers Ecology Sampling Trip

U.S. Geological Survey, SESQA Water-Quality Sampling

U.S.G.S. South Central Climate Science Center

U.S.G.S. Southeast Climate Science Center Images

U.S. Geological Survey, Water Gages

U.S.G.S. WaterSmart Low Flow Fish Sampling

U.S. Virgin Islands, June 2021

Utah April 2007

Valley View Glades Natural Area, Missouri

Various Images

Videos

Volcanoes, Volcanism, and Eruptions

Voronja Caving Expedition, Abkhasia, Georgia, Summer 2004

Washington Fall 2005