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a mayfly lands on the surface tension of a still pond creating a smooth ripple
Testing water with a water parameter meter, such as pH, conductivity, Ta, redox and oxygen.
San Juan Creek in Caspers Wilderness Park in southern California.
A view of the creek, where the water level is very low due to the heat among the trees.
Gevora rocky riverbed, La Codosera, Badajoz, Extremadura, Spain. Idyllic location of crystal clear waters and riverside forests
Coloma California near the original 1848 gold discovery site you find many gold miners such as this one.
In the middle distance is a sixty six year old man looking at a clear river. On the right hand riverbank are green trees, and a small beach. The sky is blue and it looks hot. The photo was taken near the Sima de San Pedro, or the Voragine di Saint Peter, sinkhole located near Oliete, a small town in May 2023.
segmenat of a reflective river, Carmel Valley, CA
Hiker crossing a stream. Camino de Santiago.2
Woman is trying to fish in mountain river
Annual swarm of long-tailed mayfly on Tisza river in Serbia.
The Verde Valley is a unique, high desert ecosystem where the Colorado Plateau meets the Sonoran Desert.  It is surprising to find several seasonal and perennial waterways winding through the valley.  From springtime through fall, these waterways can be seen from the nearby limestone hilltops, like a vein of bright, colorful leaves from sycamore, cottonwood and willow trees.  These river-dependent trees provide critical habitat and cover for local plants and wildlife.  The Verde River is a significant watercourse in central Arizona. It is one of the major tributaries of the Salt River and is approximately 170 miles long. The headwaters of the Verde River are in the Prescott National Forest near Sullivan Lake.  The river ends at its confluence with the Salt River near Fountain Hills.  The Verde River is one of the few rivers in Arizona that flows year-round. Its flow is mainly sourced from snowmelt and springs in the upper reaches, as well as intermittent monsoon rains during the summer.  The river's riparian habitat supports a rich and diverse ecosystem, making it a crucial area for wildlife and plant species.  The Verde River is not only a vital water source but also a cherished natural and cultural resource in Arizona. Its scenic beauty, diverse ecosystems, and recreational opportunities make it an important part of the state's landscape and history.  This view of the Verde River was photographed from the Jail Trail Riverwalk in Cottonwood, Arizona, USA.
Palingenia Longicauda insect Tisza river insect phenomenon
Olona Valley
Tisza mayflies (Palingania longicauda) swarming, River Tisza, Hungary
Adult man relax walking on sunny summer day in beautiful countryside
Adıyaman, Turkey - July 15, 2021: Turkish people fishing in cendere river (cendere çayı) near cendere bridge which is called Severan (Septimius Severus) Roman bridge in Mount Nemrut National Park, Eastern Anatolia, Turkey adıyaman.
Close-up of River l'Arve with pebbles at river bank at Swiss City of Geneva on a sunny winter day. Photo taken March 5th, 2023, Geneva, Switzerland.
Clear stream of Shimizu River and Baikamo, Kamikochi end of October
Young boy wading in a creek on a summer day.
Morse Creek in the High Country
Little boy with old-fashioned fishing rod, fishing in river at forest
Libelula azul posando sobre roca
8 Year Old Boy Fly Fishing crossing the stream.
man on the bank of a stream
Oak Creek near Sedona Arizona
Tranquil and slow-moving river surrounded by fall or autumn foliage in rural Arizona
Adult man relax walking on sunny summer day in beautiful countryside
Los Angeles, CA
Southern state freshwater wetland forest on a on a sunny day in early spring (April 11). The image was captured in Big Creek, Forsyth, (near Cumming) in Georgia (USA) with a full frame mirrorless digital camera and a sharp telephoto lens, resulting in large clean files and images with shallow depth-of-field. The image is part of a large series of Georgia wetland at different seasons.
Free Images: "bestof:Medea Creek at Paramount Ranch. A park biologist shares his discovery of a mayfly in Medea Creek at Paramount Ranch."
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Rock Creek Station SHP Pony Express monument.JPG
GARY_JOHANSEN_ON_HIS_CATTLE_RANCH._PART_OF_HIS_LAND_WAS_FLOODED_WHEN_A_GRAVEL_OPERATION'S_DIKE_ON_BIG_CREEK_BROKE..._-_NARA_-_544994.tif
GARY_JOHANSEN_ON_HIS_CATTLE_RANCH._PART_OF_HIS_LAND_WAS_FLOODED_WHEN_A_GRAVEL_OPERATION'S_DIKE_ON_BIG_CREEK_BROKE..._-_NARA_-_544994.jpg
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Trout stream at the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634156.tif.tiff
Main cabin at the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634163.tif.tiff
Moose trophy head inside the main cabin of the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634162.tif.tiff
Lampshade inside the main cabin at the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634157.tif.tiff
Lampshade inside the main cabin at the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634160.tif.tiff
Mountain sheep head inside the main cabin of the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634161.tif.tiff
Large barn at the Ranch A Education Center, a complex of buildings, now owned by the State of Wyoming, near Beulah, Wyoming LCCN2015634155.tif.tiff
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Congleton_Ranch_on_Beaver_Creek,_Paulina_C&H_Range,_Ochoco_Forest,_1918._-_NARA_-_299178.tif
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Redwoods Little Creek Swanton Pacific Ranch.JPG
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ShadowCreekRanch.JPG
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Dehorning_Cattle,_Stanton_Ranch,_Mill_Creek,_Ochoco_Forest,_1915._-_NARA_-_299138.tif
Steins_Pillar,_Barney_Ranch_on_Mill_Creek,_Ochoco_Forest,_1916._-_NARA_-_299181.tif
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Steins_Pillar,_Barney_Ranch_on_Mill_Creek,_Ochoco_Forest,_1916._-_NARA_-_299181.jpg
Steins_Pillar,_Barney_Ranch_on_Mill_Creek,_Ochoco_Forest,_1916._-_NARA_-_299182.jpg
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Weidemeyer's_Admiral,_Pack_Creek_Ranch,_San_Juan_County,_UT_1.jpg
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Photograph,_with_caption,_of_building_at_Pine_Creek_Ranch,_Nevada,_apparently_taken_to_document_matters_relating_to..._-_NARA_-_296196.tif
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