Tue . 19 Jun 2019

Trans-Pecos rat snake

trans pecos rat snake, trans pecos rat snakes for sale
Bogertophis subocularis, commonly known as the Trans-Pecos rat snake23 or the Davis Mountain rat snake,45 is a species of medium to large, nonvenomous rat snake in the family Colubridae Bogertophis subocularis is endemic to the Chihuahuan Desert


  • 1 Geographic range
  • 2 Description
  • 3 Habitat
  • 4 Behavior
  • 5 Sexual dimorphism
  • 6 Reproduction
  • 7 References
  • 8 Further reading
  • 9 External links

Geographic rangeedit

The Trans-Pecos rat snake is found in the Mexican state of Coahuila, and its range extends northward into Texas and New Mexico in the United States4


B subocularis has a row of small scales suboculars between the lower border of the eye and the upper labials5 This beautiful snake is yellow to tan dorsally with a series of black, or dark brown, H-shaped markings2 The eyes are large and prominent, light-colored with contrasting round black pupils The tongue is pink Dorsal scales in 31-35 rows Ventrals 260-277; subcaudals 69-793

Adults are usually 36-54 inches 90–137 cm in total length including tail The record total length is 66 inches 168 cm6


The Trans-Pecos rat snake's habitat consists of desert flats and brushy slopes, and rocky outcrops where they nest and feed on small vertebrates


A nocturnal species, it is uncommon and rarely seen in the wild, save on warm summer nights during the breeding season Nicknamed "subocs" by enthusiasts, they are unaggressive when approached, even passive, and are easily raised in captivity

Sexual dimorphismedit

B subocularis exhibits sexual dimorphism Females are larger than males as adults Adult males reach between 35 and 45 feet 11-14 m in total length including tail; whereas females grow up to 55 feet 17 m23


The breeding season for B subocularis runs through May and June, while egg-laying begins in July and ends by September At nearly three months, their incubation period is lengthy for a snake, at the end of which a clutch of anywhere from three to 11 snakes, each 28–33 cm 11–13 in in total length, hatch As they are born during winter, the hatchlings may remain hidden underground for several months before venturing outside


  1. ^ "Bogertophis subocularis " The Reptile Database wwwreptile-databaseorg
  2. ^ a b c Conant R 1975 A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition Boston: Houghton Mifflin xviii + 429 pp + Plates 1-48 ISBN 0-395-19979-4 hardcover, ISBN 0-395-19977-8 paperback Elaphe subocularis, p 197 + Plate 32 + Map 151
  3. ^ a b c Smith HM, Brodie ED Jr 1982 Reptiles of North America: A Guide to Field Identification New York: Golden Press 240 pp ISBN 0-307-47009-1 hardcover, ISBN 0-307-13666-3 paperback Elaphe subocularis, pp 184-185
  4. ^ a b Wright AH, Wright AA 1957 Handbook of Snakes of the United States and Canada Ithaca and London: Comstock 1,105 pp in two volumes Elaphe subocularis, pp 255-259, Figure 79 + Map 23 on p 223
  5. ^ a b Schmidt KP, Davis DD 1941 Field Book of Snakes of the United States and Canada New York: GP Putnam's Sons 365 pp Elaphe subocularis, pp 152-153, Figure 41
  6. ^ Powell, Robert; Conant, Roger; Collins, Joseph T 2016 Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America, Fourth Edition Boston and New York: Houghton Mifflin Harcourt xsiv + 494 pp ISBN 978-0-544-12997-9 Bogertophis subocularis, p 384 + Plate 35

Further readingedit

  • Brown AE 1901 "A New Species of Coluber from Western Texas" Proc Acad Nat Sci Philadelphia 53: 492-495 + Plate XXIX Coluber subocularis, new species
  • Rhoads, Dusty 2008 The Complete Suboc - A Comprehensive Guide to the Natural History, Care, and Breeding of the Trans-Pecos Ratsnake Lansing, Michigan: ECO Herpetological Publishing & Distribution 291 pp ISBN 978-0978897956
  • Stebbins RC 2003 A Field Guide to Western Reptiles and Amphibians, Third Edition The Peterson Field Guide Series ® Boston and New York: Houghton Mifflin Company xiii + 533 pp ISBN 978-0-395-98272-3 Bogertophis subocularis, p 360 + Plate 45 + Map 150
  • Stejneger L, Barbour T 1917 A Check List of North American Amphibians and Reptiles Cambridge, Massachusetts: Harvard University Press 125 pp Elaphe subocularis, new combination, p 84
  • Tennant, Alan 1998 A Field Guide to Texas Snakes, Second Edition Houston, Texas: Gulf Publishing Company pp 200–201

External linksedit

  • Species Bogertophis subocularis at The Reptile Database
  • Simply Subocs
  • Suboccom

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