INATURALIST Observations 90144650
Los Cabos, Baja California Sur: 23.054533, -109.690961: : 8/6/2021: Enrique Flores Garc├¡a: 6 Aug 2021 ; Coordinate Uncertainty in Meters: 0.11000.

INATURALIST Observations 102058117
Los Cabos, Baja California Sur: 23.439626, -109.808617: : 11/27/2021: Annamaria Savarino: 27 Nov 2021 ; Coordinate Uncertainty in Meters: 0.11000.

INATURALIST Observations 152595620
La Paz, Baja California Sur: 23.525267, -110.02959: : 11/28/2018: Gerardo Marr├│n: 28 Nov 2018 ; Coordinate Uncertainty in Meters: 211.00000.

La Paz, Baja California Sur: 23.546522, -110.015239: : 3/16/2023: Osiel Flores: 16 Mar 2023 ; Coordinate Uncertainty in Meters: 293.00000.

Occurrence Remarks: Exif_JPEG_420; Coordinate Uncertainty in Meters: 2.00000.

La Paz, Baja California Sur: 23.764873, -109.998548: : 8/11/2018: Daniele Gualdoni: 11 Aug 2018 ; Coordinate Uncertainty in Meters: 8.00000.

La Paz, Baja California Sur: 23.79973, -109.889595: : 11/6/2017: Jorge H. Valdez: 6 Nov 2017 ; Coordinate Uncertainty in Meters: 1.11000.

La Paz, Baja California Sur: 23.866533, -110.146697: : 8/28/2022: heidi_vera: 28 Aug 2022 ; Coordinate Uncertainty in Meters: 1984.00000.

La Paz, Baja California Sur: 24.005706, -110.106217: : 2/11/2024: Chaos_Entomologist: 11 Feb 2024 ; Coordinate Uncertainty in Meters: 24.00000.

La Paz, Baja California Sur: 24.006527, -110.095714: : 5/24/2023: Gerardo Marr├│n: 24 May 2023 ; Coordinate Uncertainty in Meters: 0.11000.

La Paz, Baja California Sur: 24.013024, -110.14321: : 9/22/2024: Eduardo Fern├índez Reza: 22 Sep 2024 :
Occurrence Remarks: T. planiceps o T. yaquia??; Coordinate Uncertainty in Meters: 31.00000.

La Paz, Baja California Sur: 24.046092, -110.067886: : 9/12/2016: mstepek: 12 Sep 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Baja California Sur: 25.768387, -111.318441: : 3/15/2026: joshbeas: 15 Mar 2026 ; Coordinate Uncertainty in Meters: 29936.00000.

Unknown, Baja California: 30.740583, -115.96535: : 5/27/2026: Lizbeth Guti├⌐rrez Vargas: 27 May 2026 ; Coordinate Uncertainty in Meters: 172.00000.

Ensenada, Baja California: 30.964517, -115.620132: : 5/25/2024: Pablo Guti├⌐rrez Maier: 25 May 2024 ; Coordinate Uncertainty in Meters: 199.00000.

Ensenada, Baja California: 31.89867, -116.676188: : 9/30/2025: kamefg: 30 Sep 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Mexicali, Baja California: 32.155467, -115.788588: : 3/11/2023: Mason Clark: 11 Mar 2023 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Snake was unintentionally dug up from a burrow in the mid morning. Small slender snake, black head, white collar, tan body. See photo.; Coordinate Uncertainty in Meters: 29066.00000.

GBIFID: 4516698998;; Coordinate Uncertainty in Meters: 29066.00000.

GBIFID: 4129908151;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3070273420;; Coordinate Uncertainty in Meters: 29066.00000.

GBIFID: 2641432304; Occurrence Remarks: Aproximately 7 inches long and 3/16th inches in diameter. Snake carefully moved off trail so is playing dead but is alive and well.;; Coordinate Uncertainty in Meters: 132.00000.

GBIFID: 2238811398; Occurrence Remarks: Baby snake;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2238809613; Occurrence Remarks: Snake;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1640055303; Occurrence Remarks: Ring-necked snake;; Coordinate Uncertainty in Meters: 375.00000.

GBIFID: 891038862; Occurrence Remarks: Lifer, flipped under a rock, could not get insitu shots since it was so small and fast so I caught temporarily for the pics.;; Coordinate Uncertainty in Meters: 102.00000.

Occurrence Remarks: Occurrence Remarks: In the road; deceased. Maybe 7 long? (It looks a little larger in the photo and I didnt think to put my measuring tape next to it, but it was fairly small.); Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 4145802423; Occurrence Remarks: Snake was dead when found on the trail, likely ran over by a biker.;; Coordinate Uncertainty in Meters: 24.00000.

Riverside, California: 33.574758, -116.438647: : 5/24/2026: Trevor Van Loon: 24 May 2026 ; Coordinate Uncertainty in Meters: 853.00000.

San Diego, California: 32.857779, -117.218216: : 5/31/2026: Caden Sherman: 31 May 2026 ; Coordinate Uncertainty in Meters: 76.00000.

San Diego, California: 33.128998, -116.775844: : 3/28/2026: Sarah Sol├¡s: 28 Mar 2026 ; Coordinate Uncertainty in Meters: 80.00000.

Riverside, California: 33.832517, -116.772422: : 5/1/2026: Richard Robbins: 1 May 2026 ; Coordinate Uncertainty in Meters: 28902.00000.

Orange, California: 33.611635, -117.696047: : 1/18/2026: california_every_reptile: 18 Jan 2026 ; Coordinate Uncertainty in Meters: 28930.00000.

Orange, California: 33.838147, -117.739083: : 5/11/2026: vcl_herping: 11 May 2026 ; Coordinate Uncertainty in Meters: 9.00000.

San Diego, California: 33.13575, -116.78688: : 3/29/2026: Jeff Nordland: 29 Mar 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Riverside, California: 33.932548, -117.605048: : 4/18/2026: thenewtking: 18 Apr 2026 ; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 3802765405; Occurrence Remarks: Briefly stumbled upon while crossing a dirt road. I quickly snapped these pictures before it wiggled into the nearby oak leaf litter & disappeared. Surrounding habitat riparian, with the hill above turning chaparral.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3858706911; Occurrence Remarks: Sunning on trail;; Coordinate Uncertainty in Meters: 60.00000.

GBIFID: 4075959087; Occurrence Remarks: And then 2 more!;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 4075838055; Occurrence Remarks: Finally got my lifer;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 1898817467; Occurrence Remarks: Took my dog out before bed and found this guy on the patio.;; Coordinate Uncertainty in Meters: 29039.00000.

San Diego, California: 32.962325, -117.020119: : 7/8/2015: Bradford Hollingsworth: 8 Jul 2015 :
GBIFID: 1132414200; Occurrence Remarks: Poway... Wren, Phoebe, and Maggie found it during their evening walk.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4420690974; Occurrence Remarks: About 8ΓÇ¥ long, brown thin body, dark head with light collar. On gravel and dirt driveway around 5pm. Was stretched out long probably sunning but accelerated away quickly in S movements.;; Coordinate Uncertainty in Meters: 1840.00000.

GBIFID: 4891953135; Occurrence Remarks: Rescued from swimming pool;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2252043343; Occurrence Remarks: I feel privileged to drop the first tantilla marker in Carlsbad. Found basking before dusk on the trail. Healthy looking adult and a first for me.;; Coordinate Uncertainty in Meters: 65.00000.

GBIFID: 5108087977; Occurrence Remarks: Found inside the house near carpet;; Coordinate Uncertainty in Meters: 29039.00000.

Riverside, California: 33.721546, -117.41087: : 4/9/2025: california_every_reptile: 9 Apr 2025 :

GBIFID: 2620095568; Occurrence Remarks: This was quite the day - 20+ snakes of 7 species, including one magical hour of 10 snakes of 6 species. Ruber, gopher, night, tantilla, rosy, coach, helleri.;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 2620158505; Occurrence Remarks: Pleasant little day with ruber, night, tantilla, coach, and a slender in a couple hours.;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 2802874058; Occurrence Remarks: The first tantilla I have found, this one was laying across the trail on a steep hill;; Coordinate Uncertainty in Meters: 29039.00000.

GBIFID: 1500229651; Occurrence Remarks: Found dead in the middle of the trail.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 1562922187; Occurrence Remarks: Only snake seen tonight, temps were in the lower 60s... But hey, its a lifer and a beautiful animal (I didnt know they had such a belly!) so Im happy.;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 891020543; Occurrence Remarks: Our yellow lab spotted this little snake before we did, and we took a few pictures before releasing him in a safe location. He was about 8 1/2 inches long, dark beige with a black head, red underside, and an light tan ring around his neck.;; Coordinate Uncertainty in Meters: 0.11000.

San Diego, California: 33.1379, -116.785705: : 3/29/2026: lee-encino: 29 Mar 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 13.00000.

Occurrence Remarks: Occurrence Remarks: Found underneath a large piece of plywood. Just North East of Sycamore Canyon Wilderness Park. 87 degrees.; Coordinate Uncertainty in Meters: 982.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3860130626; Occurrence Remarks: woooooooooooo!;; Coordinate Uncertainty in Meters: 28359.00000.

GBIFID: 4029119525; Occurrence Remarks: Not positive on the identification. Sharp Tailed Snake? Western Black Snake?;; Coordinate Uncertainty in Meters: 21.00000.

GBIFID: 4945588935; Occurrence Remarks: Which species?;; Coordinate Uncertainty in Meters: 4.00000.

Los Angeles, California: 34.165963, -118.00997: : 5/19/2026: sirus2: 19 May 2026 ; Coordinate Uncertainty in Meters: 76.00000.

Los Angeles, California: 34.124961, -118.638138: : 4/24/2026: brookesullivan3131: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 11.00000.

Los Angeles, California: 34.403083, -118.475628: : 11/9/2025: herphendrie: 9 Nov 2025 ; Coordinate Uncertainty in Meters: 28818.00000.

GBIFID: 4096825128; Occurrence Remarks: Big one!;; Coordinate Uncertainty in Meters: 28388.00000.

Los Angeles, California: 34.052718, -117.790141: : 4/29/2026: Jacqueline Bautista: 29 Apr 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Los Angeles, California: 34.052767, -117.790116: : 4/29/2026: sleepyjoe01: 29 Apr 2026 ; Coordinate Uncertainty in Meters: 7.00000.

San Bernardino, California: 34.054586, -117.45514: : 1/10/2026: herphendrie: 10 Jan 2026 ; Coordinate Uncertainty in Meters: 28874.00000.

San Bernardino, California: 34.072472, -117.466118: : 1/10/2026: herphendrie: 10 Jan 2026 ; Coordinate Uncertainty in Meters: 28874.00000.

San Bernardino, California: 34.143913, -117.471959: : 1/10/2026: herphendrie: 10 Jan 2026 ; Coordinate Uncertainty in Meters: 28874.00000.

Occurrence Remarks: 4th individual found this day; Coordinate Uncertainty in Meters: 28874.00000.

Occurrence Remarks: Stunning lifer; Coordinate Uncertainty in Meters: 0.11000.

Alameda, California: 37.593355, -121.848505: : 4/26/2025: Guillermo Roque: 26 Apr 2025 ; Coordinate Uncertainty in Meters: 28388.00000.

Los Angeles, California: 34.272522, -118.083797: : 3/12/2026: california_every_reptile: 12 Mar 2026 ; Coordinate Uncertainty in Meters: 28846.00000.

Los Angeles, California: 34.395713, -118.596887: : 10/4/2025: wildlife_lover: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: 400th observation of this species on iNaturalist ≡ƒöÑ≡ƒöÑ. *Tantilla planiceps* sp. lifer.; Coordinate Uncertainty in Meters: 0.11000.

Riverside, California: 33.982699, -117.333658: : 3/29/2025: Mathias Anderson: 29 Mar 2025 ; Coordinate Uncertainty in Meters: 28902.00000.

Occurrence Remarks: Textbook Tantilla flip. Super exciting lifer that unfortunately got away before two of us saw it! Lifer! Riverside County; Coordinate Uncertainty in Meters: 28902.00000.

Los Angeles, California: 34.358796, -118.196373: : 6/1/2026: Elijah S.: 1 Jun 2026 ; Coordinate Uncertainty in Meters: 28846.00000.

Los Angeles, California: 34.133556, -118.720122: : 6/3/2026: chrisbartel: 3 Jun 2026 ; Coordinate Uncertainty in Meters: 3.00000.

San Bernardino, California: 34.044721, -117.293598: : 6/13/2026: Danilo Boskovic: 13 Jun 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Los Angeles, California: 34.128139, -118.79628: : 6/15/2026: indianjointroller: 15 Jun 2026 ; Coordinate Uncertainty in Meters: 18.00000.

Los Angeles, California: 34.308125, -118.252975: : 6/21/2026: Anthony Sanchez: 21 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3772665292; Occurrence Remarks: On trail; trail just came into shade;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3859669538; Occurrence Remarks: Check when we get back;; Coordinate Uncertainty in Meters: 135.00000.

GBIFID: 3859908051; Occurrence Remarks: Wow this was an unexpected lifer! Found on road in rocky habitat adjacent to the Whitewater river.;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 3872973861; Occurrence Remarks: Brown snake with black head;; Coordinate Uncertainty in Meters: 81.00000.

GBIFID: 3873170074; Occurrence Remarks: Very small snake that is about 5ΓÇ¥ long and has a red underside. Diameter is about 1/16th inch.;; Coordinate Uncertainty in Meters: 2394.00000.

GBIFID: 3873149587; Occurrence Remarks: This pencil-thin snake was on a trail in the dry, coastal sage scrub-covered Jurupa Hills on a cloudy morning. When I saw it, it was already moving into the dry brush at a good speed. It was about 12 inches long.;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 3889132526; Occurrence Remarks: Lifer! Ambient temperature about 76┬░ F, moon waxing gibbous, illumination about 75%. About 9 total length.;; Coordinate Uncertainty in Meters: 28874.00000.

GBIFID: 3892641053; Occurrence Remarks: Ambient temperature about 75┬░ F, moon illumination about 93%. About 10 total length.;; Coordinate Uncertainty in Meters: 28874.00000.

GBIFID: 4022335731; Occurrence Remarks: Little guy was spotted being blown around by heavy winds;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4091967674; Occurrence Remarks: Found under wooden cover in Carrizo Plain National Monument, San Luis Obispo County. Found alongside Elizabeth Younce, Maeve Secor, Charlie Toney, Hydi Ybarra;; Coordinate Uncertainty in Meters: 28734.00000.

GBIFID: 4145521574; Occurrence Remarks: Found crossing a road;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 4413679926; Occurrence Remarks: My first wild snake.;; Coordinate Uncertainty in Meters: 49.00000.

GBIFID: 4516926171; Occurrence Remarks: Historic observation.;; Coordinate Uncertainty in Meters: 83.00000.

GBIFID: 4528348986; Occurrence Remarks: Find this cute little guy under a rock;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 4597457173; Occurrence Remarks: Found in area of sandy soil - photo background not representative.;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 4846804117; Occurrence Remarks: Released after photos taken;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 4900923601; Occurrence Remarks: Very flat, roadkilled Tantilla.;; Coordinate Uncertainty in Meters: 4.00000.

San Joaquin, California: 37.654353, -121.455298: : 7/3/2024: Jeremiah Degenhardt: 3 Jul 2024 :

GBIFID: 5087674388; Occurrence Remarks: Find these in the house every now and then;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5104646619; Occurrence Remarks: Griffith Park;; Coordinate Uncertainty in Meters: 28874.00000.

GBIFID: 5108431462; Occurrence Remarks: Juvenile. Found under a coverboard. Air temps in the mid to low 60s the day before. Observed on a survey with the Southwestern Herpetological Society at the Santa Susana Field Laboratory. Private property accessed with permission.;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 5133739297; Occurrence Remarks: Released after photos taken;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 5134684431; Occurrence Remarks: 3rd of 3 seen in this area. Juvenile. Found under a rock by Wyatt Stapp. The area under the rock is shown in photo 2. Current weather was hot and sunny (low to mid 70s). It rained in the area just a week prior.;; Coordinate Uncertainty in Meters: 28734.00000.

GBIFID: 5134810589; Occurrence Remarks: 1st of 3 seen in this area. Juvenile. Found under a rock (photos 1-3 are as found). Current weather was hot and sunny (low to mid 70s). It rained in the area just a week prior. Appeared to have a beaten up tail (visible in photo 1).;; Coordinate Uncertainty in Meters: 28734.00000.

GBIFID: 5134899218; Occurrence Remarks: 2nd of 3 seen in this area. Adult. Found under a rock by Wyatt Stapp (photos 1-3 are as found). Current weather was hot and sunny (low to mid 70s). It rained in the area just a week prior.;; Coordinate Uncertainty in Meters: 28734.00000.

GBIFID: 5168502250; Occurrence Remarks: Griffith Park;; Coordinate Uncertainty in Meters: 28874.00000.

GBIFID: 1265553413; Occurrence Remarks: A couple of hatchling Blackheaded snakes found near a creekbed.;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 5206381791; Occurrence Remarks: Although location is obscured, it was at 4,780 elevation.;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 5231290928; Occurrence Remarks: Lifer;; Coordinate Uncertainty in Meters: 28359.00000.

GBIFID: 2397543025; Occurrence Remarks: Western black-headed snake;; Coordinate Uncertainty in Meters: 22.00000.

GBIFID: 1270047284; Occurrence Remarks: This was a very tiny dead snake. One of the additional pictures shows it with the tip of my hiking boot for size comparison. The other additional picture shows the underside of the snake.;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 2429606823; Occurrence Remarks: Snake was released after photos were taken.;; Coordinate Uncertainty in Meters: 28846.00000.

GBIFID: 2620161222; Occurrence Remarks: Three nights, a tantilla, and a gopher in this spot.;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 2634073439; Occurrence Remarks: Tantilla planiceps. Moving across dirt road.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 2814113845; Occurrence Remarks: Chino hills state park;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 2851220083; Occurrence Remarks: Wildwood canyon trail lose yo the Lizard Rock Trail.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1572381955; Occurrence Remarks: found under log.;; Coordinate Uncertainty in Meters: 1331.00000.

GBIFID: 1024211194; Occurrence Remarks: SWHS find;; Coordinate Uncertainty in Meters: 1794.00000.

GBIFID: 3343727738; Occurrence Remarks: So sad that my first sighting of the species is roadkill...;; Coordinate Uncertainty in Meters: 181.00000.

GBIFID: 3384204319; Occurrence Remarks: Found dead on a short utility road. Western Yellowjackets were scavenging the remains, https://www.inaturalist.org/observations/96236844.;; Coordinate Uncertainty in Meters: 7.00000.

Ventura, California: 34.21217, -118.692733: : 8/25/2025: Scott Templeton: 25 Aug 2025 ; Coordinate Uncertainty in Meters: 11.00000.

Occurrence Remarks: Had an orange underside.; Coordinate Uncertainty in Meters: 47.00000.

Alameda, California: 37.510746, -121.827919: : 4/6/2025: danferlito: 6 Apr 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Occurrence Remarks: Found on road at 73 degrees F.; Coordinate Uncertainty in Meters: 28846.00000.