Species:

Diadophis punctatus

Ring-necked Snake

Some other names for this species:

Ringneck Snake

Subspecies I've seen:
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Pacific Ring-necked Snake
D. p. amabilis
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Prairie Ring-necked Snake
D. p. arnyi
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Southern Ring-necked Snake
D. p. punctatus
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Regal Ring-necked Snake
D. p. regalis
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Monterey Ring-necked Snake
D. p. vandenburghi
Subspecies:

Diadophis punctatus amabilis

Pacific Ring-necked Snake

October 2, 2005
Pescadero Marsh Natural Preserve, San Mateo County, California
Pacific Ring-necked Snake (Diadophis punctatus amabilis)
I was surprised to see this pretty little ring-necked snake under a small board in the dry month of October. Ring-necked snakes are usually found when the ground is moist, but the rainy season had not yet begun.
Subspecies:

Diadophis punctatus arnyi

Prairie Ring-necked Snake

April 27, 2008
Burr Oak Woods Conservation Area, Jackson County, Missouri
Prairie Ring-necked Snake (Diadophis punctatus arnyi)
I wasn't expecting to see many herps when we stopped at this small natural area, both due to its proximity to Kansas City and due to the coolness of the morning. Come to think of it, I didn't actually see much, but I did see my first and second Prairie Ring-necked Snakes (under the same rock), as well as a few five-lined skinks.
April 28, 2008
Green Memorial Wildlife Area, Shawnee County, Kansas
Prairie Ring-necked Snake (Diadophis punctatus arnyi)
Prairie Ring-necked Snake (Diadophis punctatus arnyi)
Prairie Ring-necked Snake (Diadophis punctatus arnyi)
This was my first experience with looking for snakes in Kansas, a place famous among people who look for snakes. I'd driven across Kansas a couple of times before, but we were always in a hurry to get to Colorado where my parents live, and the weather had never been cooperative. It wasn't particularly cooperative on this day either, being pretty cool in the morning when we had just a couple of hours to spend walking the dogs and looking for wildlife. But the dogs had a good time and I uncovered eleven Prairie Ring-necked Snakes on a couple of hillsides. The snake in the second picture is the same snake as in the first picture; it decided to play dead hoping I would leave it alone (which I did pretty soon in any case).
Subspecies:

Diadophis punctatus punctatus

Southern Ring-necked Snake

March 10, 2004
Coral Gables, Miami-Dade County, Florida
Southern Ring-necked Snake (Diadophis punctatus punctatus)
Southern Ring-necked Snake (Diadophis punctatus punctatus)
Peeling old palm fronds away from the ground led me to discover two cute little ring-necked snakes on this pleasant Florida morning. This broke my snake string of seven straight Eastern Racers.
April 3, 2008
Coral Gables, Miami-Dade County, Florida
Southern Ring-necked Snake (Diadophis punctatus punctatus)
While staying at my mother-in-law's house in southern Florida, I was bemoaning the paucity of snakes I had come across in the few weeks we had been there. On the last day of our stay, we were heading out for our favorite lunch (Miami's Best Pizza, if you must know) when I glanced down to see this pretty little guy a few inches outside the front door.
Subspecies:

Diadophis punctatus regalis

Regal Ring-necked Snake

May 21, 2008
Valley of Fires State Park, Lincoln County, New Mexico
Regal Ring-necked Snake (Diadophis punctatus regalis)

The Regal Ring-necked Snake is both the largest subspecies and the one most adapted to arid conditions. And indeed, this snake was longer than any ring-necked snake that I'd previously seen, and there was no water to be seen in the area.

Like many Regal Ring-necked Snakes, this one was lacking an actual ring around its neck. Kind of poorly named, really.

Subspecies:

Diadophis punctatus vandenburghi

Monterey Ring-necked Snake

April 19, 2003
Fort Ord Public Lands, Monterey County, California
Monterey Ring-necked Snake (Diadophis punctatus vandenburghi)
Monterey Ring-necked Snake (Diadophis punctatus vandenburghi)
Ring-necked snakes are widespread and relatively common, but they are quite secretive so they're mostly seen by people like me who are actively looking under boards, rocks, etc. Even so, it took me several years of living in ring-necked snake territory before I finally got a photo of one. (I had seen one earlier disappearing into a crack.)

Ring-necked snakes are drab above but bright orange/red below. When cornered, they twist up tightly and flash their bright bellies. I'm not sure what survival value this has, but it presumably does them some good. This one was a small adult, at about 8 inches long.

A note on the spelling of the scientific name of this species: it's been spelled at least three different ways in various places — "vandenburghii", "vandenburgii", and "vandenburghi". Dr. Brian Crother, editor of the SSAR names list, told me in personal communication that "vandenburghi" is the correct spelling.

March 13, 2005
Fort Ord Public Lands, Monterey County, California
Monterey Ring-necked Snake (Diadophis punctatus vandenburghi)
During 2004 I was in Florida for the entire spring ring-necked snake season, but in 2005 I made it back to Fort Ord during the right conditions and found another little beauty.