Flat-headed Snake

Tantilla gracilis

Summary 5

Tantilla gracilis (flathead snake) is a species of snake of the family Colubridae.

Coloration: 6

Usually without a black cap on top of its head.
Tan or brown dorsal surface uninteruppted by dark pigment.
Ventral surface is red or pink, which may actually be present on the supralabial and temporal scales on the head.
Coloration of the head is generally darker than the rest of the body with certain individuals actually having a black cap present, though the cap does not contrast with the rest of the dorsum as strongly as seen in other species of Tantilla.
The posterior edge of the black cap in T. gracilis is concave and does not extend below the corner of the mouth.

Behavior: 6

Tantilla gracilis feeds on arthropods, including centipedes, which also take advantage of the high moisture in such habitats. Tantilla gracilis is not a threat to humans who handle it, and captive snakes will often shove their heads into the folds of a captors hands looking for advantages to escape.

Habitat: 6

A common inhabitant of many gardens and urban areas, Tantilla gracilis is also found in piles of rocks and leaves in a variety of habitats; the common theme of these habitats is a high moisture content.

General Distribution: 6

The range of Tantilla gracilis extends from the lower Rio Grande valley northward to Kansas and Missouri.

Texas Distribution: 6

In Texas, Tantilla gracilis is found throughout the central and eastern portions of the state, including a few isolated populations in the Panhandle.

Sources and Credits

  1. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
  2. (c) James Maughn, some rights reserved (CC BY-NC), uploaded by James Maughn
  3. (c) Chris Harrison, some rights reserved (CC BY-NC), uploaded by Chris Harrison
  4. (c) Judith Ellen Lopez, some rights reserved (CC BY-NC), https://picasaweb.google.com/112692329998402018828/6277168244772132145?locked=true#6277169443806461682
  5. Adapted by Desmon M Dunn from a work by (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Tantilla_gracilis
  6. (c) Caleb Paul, some rights reserved (CC BY-SA), https://www.inaturalist.org/guide_taxa/776620

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