Giant Garter snake (Thamnophis gigas)

Federal Register | Recovery | Critical Habitat | Conservation Plans | Petitions | Life History

Listing Status:   

Where Listed: WHEREVER FOUND

General Information

Dorsal background coloration (the basic color on the snake's back) varies from brownish to olive with a checkered pattern of black spots, separated by a yellow dorsal stripe and two light colored lateral stripes. Background coloration and prominence of a black checkered pattern and the three light stripes are geographically and individually variable. The ventral surface (the snake's underside) is cream to olive or brown and sometimes infused with orange, especially in northern populations.

  • States/US Territories in which the Giant Garter snake, Wherever found is known to or is believed to occur:  California
  • US Counties in which the Giant Garter snake, Wherever found is known to or is believed to occur:  View All
  • USFWS Refuges in which the Giant Garter snake, Wherever found is known to occur:  Butte Sink Wildlife Management Area, Colusa National Wildlife Refuge, Delevan National Wildlife Refuge, Grasslands Wildlife Management Area, North Central Valley Wildlife Management Area  ... Show All Refuges
  • Additional species information
 
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
10/20/1993 California/Nevada Region (Region 8) Wherever found

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
03/22/1991 56 FR 12146 12148 ETWP; 90-Day Findings and Commencement of Status Reviews for Seven Petitions to List Five Species as Threatened or Endangered; 56 FR 12146 12148
05/25/2011 76 FR 30377 30382 Initiation of 5-Year Reviews of Species in California, Nevada, and the Klamath Basin of Oregon
07/07/2005 70 FR 39327 39329 Endangered and Threatened Wildlife and Plants; Initiation of 5-Year Reviews of the Valley Elderberry Longhorn Beetle, Smith's Blue Butterfly, Delhi Sands Flower Loving Fly, Morro Shoulderband Snail, Giant Garter Snake, San Francisco Garter Snake, Island Night Lizard, California Least Tern, Least Bell's Vireo, Chinese Camp Brodiaea, Mariposa Pussypaws, San Clemente Island Indian Paintbrush, Spring-Loving Centaury, Springville Clarkia, San Clemente Island Larkspur, Santa Barbara Island Dudleya, Ash Meadows Gumplant, San Clemente Island Woodland Star, San Clemente Island Lotus, San Clemente Island Bush Mallow, Amargosa Niterwort, Eureka Valley Evening Primrose, Yreka Phlox, Hartweg's Golden Sunburst, San Joaquin Adobe Sunburst, Santa Cruz Island Rock-Cress, Keck's Checker-mallow, Eureka Dune Grass, Kneeland Prairie Pennycress, Hidden Lake Bluecurls, and Red Hills Vervain
11/04/2013 78 FR 66058 66061 Habitat Conservation Plan for South Sacramento County, California
03/07/2005 70 FR 11022 11024 Preparation of an Environmental Impact Statement for Issuance of an Incidental Take Permit Associated with a Habitat Conservation Plan for Western Placer County, CA
11/04/2002 67 FR 67209 67210 Fish and Wildlife Service, Interior:Draft Environmental Impact Report/Environmental Impact Statement and Habitat Conservation Plan for the Natomas Basin, Sacramento County, CA; Extension of comment period and notice of availability.
12/22/2015 80 FR 79606 79607 Revised Draft Recovery Plan for the Giant Garter Snake; Notice of availability
04/01/2013 78 FR 19510 19514 Initiation of 5-Year Reviews of 56 Species in California and Nevada; request for information
11/03/2005 70 FR 66842 66844 Endangered and Threatened Wildlife and Plants; Extension of Comment Period for the Valley Elderberry Longhorn Beetle, Smith's Blue Butterfly, Delhi Sands Flower Loving Fly, Morro Shoulderband Snail, Giant Garter Snake, San Francisco Garter Snake, Island Night Lizard, California Least Tern, Least Bell's Vireo, Chinese Camp Brodiaea, Mariposa Pussypaws, San Clemente Island Indian Paintbrush, Spring-Loving Centaury, Springville Clarkia, San Clemente Island Larkspur, Santa Barbara Island Dudleya, Ash Meadows Gumplant, San Clemente Island Woodland Star, San Clemente Island Lotus, San Clemente Island Bush Mallow, Amargosa Niterwort, Eureka Valley Evening Primrose, Yreka Phlox, Hartweg's Golden Sunburst, San Joaquin Adobe Sunburst, Santa Cruz Island Rock-Cress, Keck's Checker-mallow, Eureka Dune Grass, Kneeland Prairie Pennycress, Hidden Lake Bluecurls, and Red Hills Vervain 5-Year Reviews.
09/02/2005 70 FR 52434 52436 Notice of Availability of a Draft Environmental Impact Statement/Environmental Impact Report and Receipt of an Application for an Incidental Take Permit for the East Contra Costa County Habitat Conservation Plan and Natural Community Conservation Plan, Contra Costa County, CA
10/20/1993 58 FR 54053 54066 ETWP; Determination of Threatened Status for the Giant Garter Snake
12/27/1991 56 FR 67046 67053 ETWP; Proposed Endangered Status for the Giant Garter Snake; 56 FR 67046 67053
02/14/2007 72 FR 7064 7084 Initiation of 5-Year Reviews of 58 Species in California and Nevada; Availability of Completed 5-Year Reviews in California and Nevada

» Recovery

Current Recovery Plan(s)
Date Title Plan Action Status Plan Status
12/22/2015 Revised Draft Recovery Plan for Giant Garter Snake (Thamnophis gigas) Recovery efforts in progress, but no implementation information yet to display Draft
Other Recovery Documents
Date Citation Page Title Document Type
12/22/2015 80 FR 79606 79607 Revised Draft Recovery Plan for the Giant Garter Snake; Notice of availability
  • Notice Draft Recovery Plan Availability
05/25/2011 76 FR 30377 30382 Initiation of 5-Year Reviews of Species in California, Nevada, and the Klamath Basin of Oregon
  • Notice 5-year Review, Initiation
02/14/2007 72 FR 7064 7084 Initiation of 5-Year Reviews of 58 Species in California and Nevada; Availability of Completed 5-Year Reviews in California and Nevada
  • Notice 5-year Review, Completion
04/01/2013 78 FR 19510 19514 Initiation of 5-Year Reviews of 56 Species in California and Nevada; request for information
  • Notice 5-year Review, Completion
07/07/2005 70 FR 39327 39329 Endangered and Threatened Wildlife and Plants; Initiation of 5-Year Reviews of the Valley Elderberry Longhorn Beetle, Smith's Blue Butterfly, Delhi Sands Flower Loving Fly, Morro Shoulderband Snail, Giant Garter Snake, San Francisco Garter Snake, Island Night Lizard, California Least Tern, Least Bell's Vireo, Chinese Camp Brodiaea, Mariposa Pussypaws, San Clemente Island Indian Paintbrush, Spring-Loving Centaury, Springville Clarkia, San Clemente Island Larkspur, Santa Barbara Island Dudleya, Ash Meadows Gumplant, San Clemente Island Woodland Star, San Clemente Island Lotus, San Clemente Island Bush Mallow, Amargosa Niterwort, Eureka Valley Evening Primrose, Yreka Phlox, Hartweg's Golden Sunburst, San Joaquin Adobe Sunburst, Santa Cruz Island Rock-Cress, Keck's Checker-mallow, Eureka Dune Grass, Kneeland Prairie Pennycress, Hidden Lake Bluecurls, and Red Hills Vervain
  • Notice 5-year Review, Initiation
11/03/2005 70 FR 66842 66844 Endangered and Threatened Wildlife and Plants; Extension of Comment Period for the Valley Elderberry Longhorn Beetle, Smith's Blue Butterfly, Delhi Sands Flower Loving Fly, Morro Shoulderband Snail, Giant Garter Snake, San Francisco Garter Snake, Island Night Lizard, California Least Tern, Least Bell's Vireo, Chinese Camp Brodiaea, Mariposa Pussypaws, San Clemente Island Indian Paintbrush, Spring-Loving Centaury, Springville Clarkia, San Clemente Island Larkspur, Santa Barbara Island Dudleya, Ash Meadows Gumplant, San Clemente Island Woodland Star, San Clemente Island Lotus, San Clemente Island Bush Mallow, Amargosa Niterwort, Eureka Valley Evening Primrose, Yreka Phlox, Hartweg's Golden Sunburst, San Joaquin Adobe Sunburst, Santa Cruz Island Rock-Cress, Keck's Checker-mallow, Eureka Dune Grass, Kneeland Prairie Pennycress, Hidden Lake Bluecurls, and Red Hills Vervain 5-Year Reviews.
  • Notice 5-year Review
  • Notice Comment Period Extension
Five Year Review
Date Title
06/20/2012 Giant Garter Snake (Thamnophis gigas) 5-Year Review (2012)
09/26/2006 Giant Garter Snake 5-Year Review

» Critical Habitat

No critical habitat rules have been published for the Giant Garter snake.

» Conservation Plans

Habitat Conservation Plans (HCP) (learn more)
HCP Plan Summaries
Cal. Dept. of Fish & Game Striped Bass Conservation Plan
East Contra Costa County HCP/NCCP
Kern Water Bank
Maxwell Irrigation District
Natomas Basin, Metro Air Park
Natomas Basin Revised HCP and Litigation Resolution - City of Sacramento, Sutter County, and Natomas Basin Conservancy
PG&E San Joaquin Valley Operations & Maintenance HCP
San Joaquin County Multi-Species Habitat Conservation and Open Space Plan
Safe Harbor Agreements (SHA): (learn more)
SHA Plan Summaries
City of Elk Grove Safe Harbor Agreement
Sacramento River Conservation Area Forum
Yolo County Audubon

» Petitions

» Life History

No Life History information has been entered into this system for this species.

» Other Resources

NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.