A Ruddy Duck (Oxyura jamaicensis) was swimming among waves at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on November 5, 2021.

Ruddy Duck (Oxyura jamaicensis) at Salt Plains National Wildlife Refuge in Oklahoma, November 5, 2021

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#birds #ducks #SaltplainsNWR #wildlife #wildlifephotography #Oklahoma #photography

Hooded Merganser (Lophodytes cucullatus) ducks were swimming in the salty water on the salt flats at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on November 5, 2021.

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Hooded Merganser (Lophodytes cucullatus) at Salt Plains National Wildlife Refuge in Alfalfa County, #Oklahoma, US on Nov. 5, 2021

Some camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#birds #ducks #SaltplainsNWR #wildlife #wildlifephotography #photography

Three Sandhill Cranes (Antigone canadensis) were flying close to each other with a gray sky in the background at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on November 5, 2021.

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Sandhill Cranes (Antigone canadensis) at Salt Plains National Wildlife Refuge in Alfalfa County, #Oklahoma, US, November 5, 2021

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#birds #SaltplainsNWR #wildlife #wildlifephotography #photography

Three Sandhill Cranes (Antigone canadensis) were flying close to each other with a gray sky in the background at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on November 5, 2021.

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Sandhill Cranes (Antigone canadensis) at Salt Plains National Wildlife Refuge in Alfalfa County, #Oklahoma, US, November 5, 2021

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#birds #SaltplainsNWR #wildlife #wildlifephotography #photography

A Coyote (Canis latrans) was walking in shallow water toward Mallards (Anas platyrhynchos) after the other tasty looking birds had flown at Salt Plains National Wildlife Refuge in Alfalfa, County, Oklahoma, United States on November 5, 2021.

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Coyote (Canis latrans) and Mallards (Anas platyrhynchos) at Salt Plains National Wildlife Refuge in #Oklahoma, November 5, 2021

Some camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#coyote #birds #SaltplainsNWR #wildlife #wildlifephotography #photography

A Coyote (Canis latrans) was standing in shallow water and beginning to turn back toward Mallards (Anas platyrhynchos) after the other tasty looking birds had flown at Salt Plains National Wildlife Refuge in Alfalfa, County, Oklahoma on November 5, 2021.

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#Coyote (Canis latrans) and Mallards (Anas platyrhynchos) at Salt Plains National Wildlife Refuge in #Oklahoma, US, November 5, 2021

Some camera settings I used are at: www.rsok.com/~jrm/2021Nov...

#ducks #SaltplainsNWR #wildlife #wildlifephotography #wetlands #photography

DescriptionA Coyote (Canis latrans) had run into the water and many birds flew away startled, but Mallards (Anas platyrhynchos) stayed where they were at Salt Plains National Wildlife Refuge in Oklahoma, United States on November 5, 2021. This photo is also at: https://1-john-moyer.pixels.com/featured/coyote-5199-john-moyer.html

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#Coyote (Canis latrans) at Salt Plains National Wildlife Refuge in Alfalfa County, #Oklahoma, US on Nov. 5, 2021.

Some camera settings I used are at: www.rsok.com/~jrm/2021Nov...

#wildlife #wildlifephotography #wetlands #photography

( also at 1-john-moyer.pixels.com/featured/coy... )

American White Pelicans (Pelecanus erythrorhynchos) and Mallards (Anas platyrhynchos) and Avocets and Northern Shovelers and Ring-billed Gulls were standing on or near a sand bar at Salt Plains National Wildlife Refuge in Oklahoma, November 5, 2021.

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American White Pelicans (Pelecanus erythrorhynchos), Mallards (Anas platyrhynchos) and Avocets, Northern Shovelers, Ring-billed Gulls in #Oklahoma, Nov. 5, 2021

camera settings I used are at: www.rsok.com/~jrm/2021Nov...

#birds #SaltplainsNWR #wildlife #wildlifephotography #photography

American Avocets (Recurvirostra americana) were walking through shallow water and finding things to eat at Salt Plains National Wildlife Refuge in Oklahoma, November 5, 2021.

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American Avocets (Recurvirostra americana) at Salt Plains National Wildlife Refuge in Oklahoma, November 5, 2021

Some camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#birds #SaltplainsNWR #wildlife #wildlifephotography #wetlands #Oklahoma #photography

American Avocets (Recurvirostra americana) were walking through shallow water among waves with heads down into the water to find food at Salt Plains National Wildlife Refuge in Oklahoma, November 5, 2021.

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American Avocets (Recurvirostra americana) at Salt Plains National Wildlife Refuge in #Oklahoma, November 5, 2021

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2021Nov...

#birds #wetlands #SaltplainsNWR #wildlife #wildlifephotography #photography

A Tufted Titmouse (Baeolophus bicolor) in an oak tree near lichen in Norman, Oklahoma, United States on March 28, 2026.

Tufted Titmouse (Baeolophus bicolor) in Norman, Oklahoma, United States on March 28, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #titmouse #crosstimbers #wildlife #wildlifephotography #Oklahoma #photography

A Tufted Titmouse (Baeolophus bicolor) was investigating a hole in an oak tree in Norman, Oklahoma, United States on March 26, 2026.

Tufted Titmouse (Baeolophus bicolor) in Norman, Oklahoma, United States on March 26, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #titmouse #wildlife #wildlifephotography #crosstimbersEcoregion #Oklahoma #photography

An Eastern Bluebird (Sialia sialis) was calling loudly to mark territory in Norman, Oklahoma, United States on March 21, 2026.

Eastern Bluebird (Sialia sialis) in Norman, Oklahoma, United States on March 21, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #wildlife #crosstimbersEcoregion #wildlifephotography #Oklahoma #photography

An American Robin (Turdus migratorius) was standing on a Virginia Creeper (Parthenocissus quinquefolia) vine in Norman, Oklahoma, United States on March 18, 2026. This photo is available as wall art or printed on other items at: https://1-john-moyer.pixels.com/featured/robin-5749-john-moyer.html and is available to be licensed for your own commercial use at: https://licensing.pixels.com/featured/robin-5749-john-moyer.html .

American Robin (Turdus migratorius) in Norman, Oklahoma, United States on March 18, 2026

Some camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #robin #wildlife #wildlifephotography #Parthenocissus #nativeplants #Oklahoma #photography #crosstimbersEcoregion

An Eastern Bluebird (Sialia sialis) was standing on an oak branch near lichen in Norman, Oklahoma, United States on March 18, 2026.

Eastern Bluebird (Sialia sialis) in Norman, Oklahoma, United States on March 18, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #bluebird #crosstimbersEcoregion #wildlife #wildlifephotography #Oklahoma #photography

A male Northern Cardinal (Cardinalis cardinalis) was standing in an oak tree with his crest lowered in Norman, Oklahoma, United States on March 17, 2026.

Northern Cardinal (Cardinalis cardinalis) in Norman, Oklahoma, United States on March 17, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #cardinal #crosstimbersEcoregion #wildlife #wildlifephotography #Oklahoma #photography

A kitten named Cloudy was running fast through henbit flowers chasing insects in Norman, Oklahoma, United States on March 12, 2026.

A kitten named Cloudy in Norman, Oklahoma, United States on March 12, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#kitten #cat #petphotography #hunting #Oklahoma #photography

A Dark-eyed Junco (Junco hyemalis) was standing in an oak tree in Norman, Oklahoma, United States on March 12, 2026.

Dark-eyed Junco (Junco hyemalis) in Norman, Oklahoma, United States on March 12, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #snowbird #Junco #wildlife #wildlifephotography #Oklahoma #photography

An Eastern Redbud (Cercis canadensis) tree was blooming in Norman, Oklahoma, United States on March 12, 2026. This wild native tree planted itself. They are very common in the crosstimbers ecoregion when allowed to grow and not mowed down.

Eastern Redbud (Cercis canadensis) tree in Norman, Oklahoma, United States on March 12, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#redbud #springflowers #crosstimbersEcoregion #nativeplants #naturephotography #Oklahoma #photography

A kitten named Cloudy was getting ready to chase a flying insect in Norman, Oklahoma, United States on March 10, 2026. Our cats are not allowed out unsupervised because there are coyotes and I do not want them to catch our wild birds.

A kitten named Cloudy in Norman, Oklahoma, United States on March 10, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#cat #kitten #petphotography #Oklahoma #photography

An Eastern Bluebird (Sialia sialis) was standing on the tip of a dead stick in Norman, Oklahoma, United States on March 9, 2026.

Eastern Bluebird (Sialia sialis) in Norman, Oklahoma, United States on March 9, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #bluebird #crosstimbersEcoregion #wildlife #wildlifephotography #Oklahoma #photography

Claude gets R/L radius calculation wrong. Run program once with "-v" and "-n 2" and "-S" program to print calculation to stderr. The number printed seems to be the diameter at first zero of Airy disk. divide by 2 to get radius and then divide by 3 to get portion of Airy disk that is nearly Gaussian.

Phlox subulata in Norman, Oklahoma, United States on March 24, 2026 I made a web page with the results of my experiment using AI to write code including images, source code, dialog with Claude, and image produced by rawtherapee from the dng raw file that Claude's program produced. https://www.rsok.com/~jrm/raw_rl_dng/index.html #AIcoding #debian #rawtherapee #jpegli #photography #nativeplants #Oklahoma

Phlox subulata in Norman, Oklahoma, United States on March 24, 2026

An experiment in teaching an AI to write code.

www.rsok.com/~jrm/raw_rl_...

#AIcoding #debian #rawtherapee #jpegli #photography #nativeplants #Oklahoma

A male Eastern Bluebird (Sialia sialis) was standing in the entrance to a nesting box holding an insect in his beak in Norman, Oklahoma, United States on March 8, 2026. I guess he might have been checking that he had not been followed home before taking the insect to a female sitting on eggs inside.

Eastern Bluebird (Sialia sialis) in Norman, Oklahoma, United States on March 8, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #bluebird #birdhouse #wildlife #wildlifephotography #Oklahoma #crosstimbersEcoregion #photography

A A kitten named Cloudy was walking through henbit, not a native plant, in Norman, Oklahoma, United States on March 8, 2026.

A kitten named Cloudy in Norman, Oklahoma, United States on March 8, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#cat #kitten #PetPhotography #Oklahoma #photography

An Eastern Bluebird (Sialia sialis) was standing in a tree in Norman, Oklahoma, United States on March 7, 2026.

Eastern Bluebird (Sialia sialis) in Norman, Oklahoma, United States on March 7, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #crosstimbersEcoregion #wildlife #wildlifephotography #Oklahoma #photography

An Eastern Bluebird (Sialia sialis) was looking out of a nesting box in Norman, Oklahoma, United States on March 7, 2026. The parallel lines of holes in the treetrunk were made by a yellow-bellied sapsucker.

Eastern Bluebird (Sialia sialis) in Norman, Oklahoma, United States on March 7, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #bluebird #birdnest #wildlife #wildlifephotography #crosstimbersEcoregion #Oklahoma #photography

A Northern Shoveler (Spatula clypeata) was swimming in a marsh at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on March 3, 2026.

Northern Shoveler (Spatula clypeata) at Salt Plains National Wildlife Refuge in Alfalfa County, #Oklahoma, US, March 3, 2026

Some camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Mar...

#birds #duck #SaltplainsNWR #wildlife #wildlifephotography #wetlands #marsh #photography

A Northern Cardinal (Cardinalis cardinalis) was standing in an oak tree with crest lowered in Norman, Oklahoma, United States on February 27, 2026.

Northern Cardinal (Cardinalis cardinalis) in Norman, Oklahoma, United States on February 27, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Feb...

#birds #cardinal #crosstimbersEcoregion #wildlife #wildlifephotography #Oklahoma #photography

A Tufted Titmouse (Baeolophus bicolor) was standing in an oak tree in Norman, Oklahoma, United States on February 25, 2026.

Tufted Titmouse (Baeolophus bicolor) in Norman, Oklahoma, United States on February 25, 2026

Some of the camera settings I used to make this photo are at: www.rsok.com/~jrm/2026Feb...

#birds #titmouse #crosstimbersEcoregion #wildlife #wildlifephotography #Oklahoma #photography