Species Detail
Mountain Spiny Lizard
Lizards

Mountain Spiny Lizard

Sceloporus jarrovii

Habitat

Coniferous forests and high mountain terrain

Range

Southwestern United States and Mexico

Adult Size

6-9 in (15-22 cm)

Diet

Insects and arachnids

Find on MorphMarket
Conservation status:Least Concern

Recommended Tank Sizes

Enclosure size guidance by life stage for Mountain Spiny Lizard. General guidelines โ€” always research species-specific requirements and size up whenever possible.

Baby

12" ร— 12" ร— 18" (~10 gal / 38 L) (30 ร— 30 ร— 46 cm)

Juvenile

18" ร— 18" ร— 24" (~25 gal / 95 L) (46 ร— 46 ร— 61 cm)

Sub-Adult

18" ร— 18" ร— 36" (~40 gal / 151 L) (46 ร— 46 ร— 91 cm)

Adult

24" ร— 24" ร— 48" (~65+ gal / 246+ L) (61 ร— 61 ร— 122 cm)

Orientation: Arboreal (tall). As a rule of thumb, the enclosure length should be at least 2ร— the reptile's adult length, and width at least 1ร—.

Ferguson Zone & UVB

The Ferguson Zone system categorizes reptiles by their natural UVB exposure needs, guiding lighting choices.

Zone 3 โ€” Sun/Canopy Basker

Tropical canopy species bask in filtered sunlight. Provide moderate UVB (5โ€“10% T5) across part of the enclosure, with dense foliage for shade and cover.

Zone 1

Crepuscular / Shade

Zone 2

Occasional Basker

Zone 3

Open Sun Basker

Zone 4

Full Sun Lover

Temperature Gradient

basking surface

85โ€“95ยฐF (29โ€“35ยฐC)

warm ambient

78โ€“85ยฐF (26โ€“29ยฐC)

cool side

72โ€“78ยฐF (22โ€“26ยฐC)

Humidity

70โ€“90%

Lighting & Photoperiod

5โ€“10% T5 HO UVB bulb. Basking bulb or LED grow lights for plants. 12 hr photoperiod year-round. Full-spectrum LED helps sustain live plants.

Heating

Overhead basking bulb or ceramic heat emitter. Heat panels for tall enclosures. Avoid heat mats for arboreal species โ€” they offer little benefit.

Decor & Furnishings

  • โ€ขSturdy vertical branches and bamboo for climbing
  • โ€ขLive plants (Pothos, Bromeliads, Philodendron)
  • โ€ขCork bark tubes and background for hiding
  • โ€ขMisting system or fogger for humidity
  • โ€ขBroad leaves as water-catching surfaces

Setup Notes

Maintain high humidity with daily misting or an automatic system. Use a drainage layer (LECA) under the substrate to prevent waterlogging. Provide good ventilation to prevent stagnant, moldy air.