Siphoneae–Riesen Algetten from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free Image from public domain license 
Fucoideae–Brauntange from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally… Free Image from public domain license 
Florideae–Rotalgen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally… Free Image from public domain license 
Melethallia–Gesellige Algetten from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free Image from public domain license 
A 1125X photomicrograph magnification of a Giemsa stained, thin film blood smear, revealed a mature, Plasmodium malariae… Free Image from public domain license 
Coqs et poules, damassé; hippocampes et algues, dentelle; lézards et ronces, grille en bronze from L'animal… Free Image from public domain license 
Children participate in snorkeling activities at the Alexander Springs Recreation Area, Ocala National Forest, Florida.… Free Image from public domain license 
Multiple waterfall streams flowing through mossy boulders. Original public domain image from Wikimedia Commons Free Image from public domain license 
Weathered. Original public domain image from Wikimedia Commons Free Image from public domain license 
Fern leaves. Original public domain image from Wikimedia Commons Free Image from public domain license 
Avalanche Lake - world at night. Original public domain image from Flickr Free Image from public domain license 
Cerfs et noisetiers, bordure, carreaux céramiques; hippocampe et algues, pied de coffret, bronze; lézards et… Free Image from public domain license 
A 1125X photomicrograph magnification of Giemsa stained blood smear, revealed a number of Plasmodium falciparum parasites, in… Free Image from public domain license 
Underwater. Original public domain image from Wikimedia Commons Free Image from public domain license 
A long-tusked elephant marching on a sunlit grassy plain. Original public domain image from Wikimedia Commons Free Image from public domain license 
A top view of green grass filling the entire frame. Original public domain image from Wikimedia Commons Free Image from public domain license 
A drone shot of a round building in a wooded area with narrow footpaths. Original public domain image from Wikimedia Commons Free Image from public domain license 
Avalanche Gorge Portrait. Original public domain image from Flickr Free Image from public domain license 
A photographer planting a tripod on a rocky bed of a creek. Original public domain image from Wikimedia Commons Free Image from public domain license 
Autumn leaf with frost. Original public domain image from Wikimedia Commons Free Image from public domain license 
A top view of whorled green and gray plant leaves in Exbury Gardens. Original public domain image from Wikimedia Commons Free Image from public domain license 
Autumn leaf. Original public domain image from Wikimedia Commons Free Image from public domain license 
Diatomea–Schachtellinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free Image from public domain license 
Hippocampes et algues, bordure. Les quatre éléments, carreaux céramiques, et lézards, bordure.… Free Image from public domain license 
Peridinea–Geikelhütchen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free Image from public domain license 
Diatomea–Schachtellinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free Image from public domain license 
Children participate in snorkeling activities at the Alexander Springs Recreation Area, Ocala National Forest, Florida.… Free Image from public domain license 
Piverts et arbre, bordure verticale. Lapins et feuilles, bordure. Méduses, anémones de mer et algues, vase.… Free Image from public domain license 
Detalo de arbtrunko falinta sur falfolia bedo.. Original public domain image from Wikimedia Commons Free Image from public domain license 
Salmon almost ready to head out to sea find refuge in the the Nooksack River, Washington, on August 7, 2019. Before log jam… Free Image from public domain license 
A hedgerow of native trees and shrubs protects water quality in a surface ditch on a dairy farm in Lynden, WA, on August 6… Free Image from public domain license 
Poissons et algues, coq, écoinçon; paons et vigne; lièvres, chiens et ronces, bordure
from L'animal dans… Free Image from public domain license 
Paons dans les sorbiers, pochoir; poissons et algues, bordure from L'animal dans la décoration (1897) illustrated by… Free Image from public domain license 
Méduses et algues, vitrail. Cigales et lis, paons et cytise, bordures from L'animal dans la décoration (1897)… Free Image from public domain license 
Poisson et algues, papier peint; pigeon et pavots, bordure de vitrail from L'animal dans la décoration (1897)… Free Image from public domain license 
Carpocoris, bordure. Aigles et pigeons, papier peint. Coquillages et algues, bordure from L'animal dans la décoration… Free Image from public domain license 
Coraux, madrepores, étoiles de mer et algues, cretonne imprimée. Canards et iris d'eau, papier peint.… Free Image from public domain license 
Merlans et algues, papier peint. Mouches et muguet, étoffe de soie. Hermine vulgaire, bordure from L'animal dans la… Free Image from public domain license 
Lefkada, Greece. Original public domain image from Wikimedia Commons Free Image from public domain license 
Sun shines over a lush green mountainside. Original public domain image from Wikimedia Commons Free Image from public domain license 
Palm Shadows. Original public domain image from Wikimedia Commons Free Image from public domain license 
Lakhamandal, India. Original public domain image from Wikimedia Commons Free Image from public domain license 
A person balancing and walking across a log in a trail in a forest. Original public domain image from Wikimedia Commons Free Image from public domain license 
Kent, United Kingdom. Original public domain image from Wikimedia Commons Free Image from public domain license 
Sugar beets raised on Kuntz farm. The Kuntz family participated in the Yellowstone Regional Agricultural Sustainability… Free Image from public domain license 
A frog with orange and yellow eyes surfacing from a clear pond. Original public domain image from Wikimedia Commons Free Image from public domain license 
Indonesia. Original public domain image from Wikimedia Commons Free Image from public domain license 
A fish on the Alexander Springs Recreation Area, Ocala National Forest, Florida. (Forest Service photo by Kate Schaefer).… Free Image from public domain license 
A tall waterfall tumbling down a tall green cliff. Original public domain image from Wikimedia Commons Free Image from public domain license 
A mossy log and green ferns on the forest floor. Original public domain image from Wikimedia Commons Free Image from public domain license 
A drone shot of a green forest. Original public domain image from Wikimedia Commons Free Image from public domain license 
Fossil Springs
Fossil Springs begin approximately three quarters of a mile above the old Fossil Creek Dam. A series of… Free Image from public domain license 
A blurry shot of a wild brown shrub with small catkins. Original public domain image from Wikimedia Commons Free Image from public domain license 
A small lone mushroom on moss in a sunny forest. Original public domain image from Wikimedia Commons Free Image from public domain license 
Hidden Gems. Original public domain image from Wikimedia Commons Free Image from public domain license 
Aerial view of a blue river with dense woods on its banks. Original public domain image from Wikimedia Commons Free Image from public domain license 
Deep Glow. Original public domain image from Wikimedia Commons Free Image from public domain license 
Ashley National Forest, Utah. (Courtesy photo by Pattiz Brothers). Original public domain image from Flickr Free Image from public domain license 
Close-up of green moss on the rough bark of a tree. Original public domain image from Wikimedia Commons Free Image from public domain license 
Macro shot of moss on a fallen tree in the winter. Original public domain image from Wikimedia Commons Free Image from public domain license 
A close-up of sea waves crashing against mossy rocks. Original public domain image from Wikimedia Commons Free Image from public domain license 
Gunsight Trail - Deep in the Heart of Texas. Original public domain image from Flickr Free Image from public domain license 
Vegetation in Paradise Valley, Petersburg Ranger District, Tongass National Forest, Alaska. (Forest Service photo by Karen… Free Image from public domain license 
An Alligator at the Alexander Springs Recreation Area, Ocala National Forest, Florida. (Forest Service photo by Kate… Free Image from public domain license 
A drone view of Lake Michigan and the forest in the fall in Prudenville, Michigan, United States. Original public domain… Free Image from public domain license 
A “one way” sign at a parking lot. Original public domain image from Wikimedia Commons Free Image from public domain license 