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Testing water with a water parameter meter, such as pH, conductivity, Ta, redox and oxygen.

Northern Pika sitting on a stone in Hokkaido.

Scientist on fieldwork in a forest ecosystem taking samples for in-depth research. Ecosystem care and sustainability.

Colorful information board about Parc natural de Mondragó Cala Mondrago Samarador Mallorca.

Two middle aged men wearing camouflage clothing sit on a mountainside in Washington state while hunting elk with a crossbow. It is a warm and sunny Autumn afternoon.

forester man conducts monitoring in pine national park. environmental Protection. forest industry.

Information Sign at Rusthall Commons near Royal Tunbridge Wells in Kent, England. It contains a map and illustrations regarding the countryside.

asian woman enjoys being in nature, beautiful forest in mountains. embracing fresh air and engaging in outdoor activities. Friluftsliv concept means spending as much time outdoors as possible

A teenaged male fisherman enjoying a beautiful day out fishing for trout in Nova Scotia

Waynesboro, United States - May 22, 2015: Information for hikers entering the Appalachian Trail in Shenandoah National Park helps minimize the impact of hikers in this crowded park space

Retired senior man in forest with camera enjoying nature photography.

Big Pine Key, USA - May 1, 2018: Florida Keys, closeup of blue lake pond information sign for National Key Deer Refuge

European otter (Lutra lutra) is swimming underwater

Scientist on fieldwork in a forest ecosystem using Ai-driven mobile application for in-depth research. Ecosystem care and sustainability.

Pika (Ochotona princeps) Looking Upward Scanning For Predators - Jasper National Park, Alberta

Retired man using a point and shoot camera to photograph wild garlic in an area of woodland in Scotland

Vancouver Island Marmot(Marmota vancouverensis) Mount Washington, Vancouver Island, BC, Canada

A hiker / Climber consults a topo map on the side of Mount Adams, WA. Mount Hood can be seen in the distance.

Myvatn, Iceland - July 4, 2023: Sign board with information on the Grjotagja Cave, a former bathing spot in northern Iceland

Caucasian man of 56 sitting in the forest at winter, operating a camera while vlogging about nature themes such as botany, biology and environmental conservation.

Three Rivers, USA - May 21, 2022: signage and rock with holes for burning fire in prehistoric indian kitchen..

A young fisherman looks out on a small trout stream in late afternoon light.

Latino couple of short bleached haired woman embracing man with locks on tree twig, taking a break. Vacation romance. Exploring Boulder Field - Ice Age geological formation in Hickory Run State Park, Poconos region, Pennsylvania

Sanguisorba minor, is an important medicinal and medicinal plant.

Aquatic plant - elodea in aquarium. Selective focus.

Scientist on fieldwork in a forest ecosystem taking samples for in-depth research. Ecosystem care and sustainability.

Genoa, Italy, July 29, 2020 - Signpost with the map of Giacopiane lake, an artificial reservoir located in the Sturla valley in the municipality of Borzonasca, inland of Chiavari, Genoa province, Italy

Retired senior man in forest with camera enjoying nature photography.

Free Images: "bestof:The Canadian naturalist and quarterly journal of science BHL7312371.jpg The Canadian naturalist and quarterly journal of science with proceedings of the Natural"

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