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Gray-banded Kingsnake
Lampropeltis alterna

Size:
  • Hatchling: 7 - 12 in.
  • Adult: 28 - 36 in.(normal)
    57.75 in.(record - Edwards County, Tx.)

Scalation:
  • Dorsal: 25 rows near midbody
  • Ventral: 210 - 232
  • Sub caudal: 56-62
  • Infra labial:10
  • Supra labial: 6 - 8
  • Anal Plate: Single

Val Verde County "Blairs" Morph
Photo by Dan Johnson - click to enlarge

Written by Joe Forks

Coloration:

  • Head:

  • Gray-bands have a well define head with large protuberant eyes. Usually a post-ocular stripe is evident, although it is greatly reduced in some alterna morph specimens. Head color ranges from black tipped, or speckled, to nearly black, or rarely entirely gray.

  • Dorsal:

  • L. alterna is a highly variable species that sometimes boasts outrageous combinations of bizarre patterned and brilliantly colored specimens. Despite the fact that some animals are clearly intermediate between the "Blair" and "Alterna" morphs, this terminology is still used to describe these reptiles because the variations of color and pattern can be so dramatic that they defy descriptions of any other generalized form. "Blairi" or the wide banded morph refers to the form with large orange saddles and relatively few or no alternate markings, and "alterna" morph refers to the form with reduced primary markings that may or may not be split with orange or red and usually accompanied by alternate markings. "Dark" or "light" phase refers to the general tone of the ground color, which is a highly variable shade of gray.

  • Ventral:

  • Ventral patterns are equally variable ranging from no pattern (almost white) to almost entirely black, or mottled black and white.

Behavior:

    Primarily nocturnal, Gray-bands are rarely seen abroad during daylight hours except preceding thunderstorms and near dawn or dusk.

    Brumation occurs from November to March with no recorded activity for these months. From mid to late April the populations residing in the lower elevations of Brewster, Presidio and Val Verde counties become active. May and June are considered the best months to try to capture a Gray-band because it is during their annual spring and early summer breeding odyssey. Reproductive males are often found out foraging and are considered to be more active at this time of year.

    During the summer months (July and August) L.alterna’s activity patterns are usually associated with the rainfall. When drought or dry weather persist, L.alterna and other species may retreat to their catacombed underground quarters and above ground activity limited to avoid dehydration.

Breeding:

    A winter dormancy period is required prior to breeding. This dormancy period is often referred to as hibernation or brumation. It is a 10 - 12 week period in which the room temperature is allowed to drop to a constant 55F.

    Two weeks prior to the cooling period, it is important to cease feeding and allow snakes to pass all material from their digestive tracts. Clean fresh drinking water should be available at all times. Brumating snakes should be checked regularly for signs of respiratory infections, weight loss and other negative symptoms. Animals that show signs of stress during this period should be removed from hibernation, warmed up and treated accordingly. They may be reintroduced to brumation when their symptoms disappear if time allows.

    Breeding may occur anywhere from three to twelve weeks after emergence. The females are placed into the males cage for breeding. Ovulation in females usually occurs after shedding and is evident by a posterior tightness or swelling. Ovulating females are usually greeted rapidly and enthusiastically by males ready to court. Courtship activities can be instigated in non-willing males by placing another male of similar size into the same cage. Combat behavior usually follows immediately.

    Four to thirteen eggs may be produced in as little as 30 days after breeding. Gravid females will go through a pre-partum shed about eight to ten days prior to laying. A nest box containing moist sphagnum moss should be introduced to the cage before the female enters this shed cycle. It is not a bad idea to remove the water bowl immediatly after the pre-partum shed so that the eggs are not deposited in it. Clean fresh water must be reintroduced immediatly after egg deposition as the females are usually dehydrated and will head straight for water after laying.

    The eggs are incubated in medium of vermiculite and water mixed at a 1:1 ratio by weight. The eggs are partially buried under the vermiculite and incubated at 80 - 82F. 100% humidity should be maintained throughout the 60 - 80 day incubation period.

Range:

    L. alterna are found in rocky environments throughout the Chihuahuan Desert from in the vicinity of San Juan del Rio in Durango, Mexico, north to Eddy County in extreme southern New Mexico. In Texas it ranges from Edwards County near Rocksprings, west to the eastern edge of El Paso County in the Hueco Mountains.

Habitat:

    Rocky canyons and arroyos, limestone ridges, talus slopes and boulder piles are preferred, although specimens are occasionally found in desert flats.

Prey:

    L. alterna feeds primarily on lizards and rodents, although lizard eggs, snake eggs and the Canyon Tree Frog Hyla arenicolor have also been reported as prey. Ophiophagy, common in Lampropeltis getula, is rare but has been observed in captive L. alterna.

Loma Alta Locality - Click to Enlarge
Gallery Photo by Mike Russo

Juno Road Locality - Click to Enlarge
Gallery Photo by Tom Anderson

Loma Alta Locality - Click to Enlarge
Gallery Photo by Mike Russo

East Sanderson Locality - Click to Enlarge
Gallery Photo by Keith Carlson

Black Gap Locality - Click to Enlarge
Gallery Photo by Lance Benton

Langtry West Locality - Click to Enlarge
Gallery Photo by Lance Benton

Alpine West Locality - Click to Enlarge
Gallery Photo by Andrew Godambe

Big Hill Locality - Click to Enlarge
Gallery Photo by Andrew Godambe


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Recent Gray-banded Kingsnakes Forum Posts
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