Reptilia · Squamata
Sceloporus poinsettiiBaird & Girard, 1852
Crevice Spiny Lizard
Photograph by Craig Hensley, CC BY, via iNaturalist
A day-active, omnivorous lizard from the Nearctic region, reaching 137 mm snout to vent.
Reptilia › Squamata › Phrynosomatidae › Sceloporus
- Grows to
- 137mm
- greatest recorded
- Eats
- Omnivorous
- Active
- Diurnal
- Lives up to
- 8years
Longer than 96% of all species in Phrynosomatidae anyone has measured.
The bar is the rank itself: its length is the share of the family this animal exceeds. The chart below is the family’s real spread, on a logarithmic scale because body length here runs from 47 to 175 mm. The solid rule is this animal. Every bar is a count of real species, and nothing on this figure is estimated.
What is known
46 sourced facts, each taken from a named scientific dataset. How to read these.
Cited from a dataset unless a row is marked otherwise.
Standing in the world
- Still living
- Extant
- Conservation status
- Least Concern
- Status assessed · the year the Red List last looked
- 2007
- Population trend
- Stable
The animal itself
- Limbs
- Four legs
- Venomous
- No
- Fangs
- None
- Longest recorded life
- 8years
- Preferred body temperature · chosen in a laboratory gradientmeasured
- 32.9°C
- Body temperature when active · measured in the wild
- 32.1°C90 °F
- Body temp in the wild · mean, when active
- 30–34.2°C86–94 °F
Degenhardt et al. 1996 write they can reproduce 3 times in their lifetime; Slavens and Slavens 1999: 8, Zuniga-Vega et al. 2016: 8
mean body temperature of active individuals in nature
body temperature of active animals in nature
Size
- Length snout to vent · greatest recorded
- 137mm5.5 in
- Length snout to vent · adult female mean
- 94.9mm3.75 in
- Largest female · snout to vent
- 97.4mm3.75 in
- Hatchling length · snout to vent
- 32mm1.25 in
- Largest juvenile · snout to vent
- 32mm1.25 in
- Body mass · greatestcomputed
- 73.28g2.6 oz
- Body mass · a typical adult
- 30.94g1.1 oz
- Body mass at hatchingmeasured
- 1g0.04 oz
max 137 mm (e.g., Heimes 2022)
snout-vent length; the source column mixes this with straight carapace length
computed from length by a family-level allometric equation, not weighed
AnAge rates this record "acceptable"
How it lives
- Diet
- Omnivorous
- How it hunts
- Sit and wait
- Active
- Diurnal
- Where it lives
- Arboreal, saxicolous, terrestrial
- Habitat
- Desert, Forest, Grassland, Rocky, Shrubland
- Biome
- Deserts & Xeric Shrublands
- Active season · months of the year
- 6–9months
- Region
- Nearctic
- Mainland or island
- Mainland
- Elevation · above sea level
- 230–3000m
- Range size
- 842,197km²
- Density
- 71–96.4per hectare
(Stebbins 2003, Barbault et al. 1985 - 25% plants, Cooper and Vitt 2002, Lemos-Espinal and Dixon 2013), ontogenetic shift from insect to plants (Greene 1982, Lemos-Espinal and Smith 2007, Lemos-Espinal and Dixon 2013, Rorabaugh and Lemos-Espinal 2016), Lemos-Espinal and Dixon 2013 and Lemos-Espinal et al. 2013 suggest diet is insects and fruit but adults feed on up to 50% plant material (also Rorabaugh and Lemos-Espinal 2016), Hibbitts and Hibbitts 2015: arthropods; arthropods, buds, blossoms and leaves (Stebbins and McGinnis 2018), arthropods and lizards, occassionally plants (Stebbins and McGinnis 2018), juveniles eat insects, more and more plants as they age, in adults nearly half the diet is plants (Heimes 2022)
e.g., Lemos-Espinal and Dixon 2013, Mesquita et al. 2016, Hibbitts and Hibbitts 2015, Rorabaugh and Lemos-Espinal 2016
Saxicolous (e.g., Olberding et al. 2016)/ Terrestrial (Mesquita et al. 2016)/good climber of rocks and trees but also on the ground (Stebbins and McGinnis 2018), largely saxicolous (Heimes 2022)
1034-1820 (Rorabaugh and Lemos-Espinal 2016), 300-2560 (Stebbins and McGinnis 2018), 230-3000 (Heimes 2022)
Breeding
- Reproduction
- Viviparous
- Sex decided by
- Genes, XX/XY
- Average clutch
- 10.95eggs
- Eggs or young per clutch
- 4–23eggs
- Mean clutch
- 6.3–13.6eggs
- Clutches in a year
- 1per year
- Clutches a year
- 1per year
- First breeds at
- 15–19.5months
6-23, mean 10.8 (Ramirez-Bautista and Davila-Ulloa 2009), 10-11 (Lemos-Espinal and Dixon 2013, Lemos-Espinal et al. 2013), 8-16 mean 13.6 (Punzo 1982), mean 10.4 (Mesquita et al. 2016), 6-23 (Hibbitts and Hibbitts 2015, Rorabaugh and Lemos-Espinal 2016), 4-23, mean 10.5 (Jimenez-Arcos et al. 2017), 7-16 (Stebbins and McGinnis 2018), 4-19 (Stebbins and McGinnis 2018), mean 6.3 (citing Gadsden et al. 2005, see also Dominguez-Guerrero et al. 2022), Gadsden et al. 2005 (5-9, mean 6.3), 5-16 (Heimes 2022)
Naming and history
- Suborder
- Sauria
- Infraorder
- Pleurodonta
- Subspecies
- Sceloporus poinsettii poinsettii BAIRD & GIRARD 1852 Sceloporus poinsettii amydrus WEBB 2006 Sceloporus poinsettii axtelli WEBB 2006 Sceloporus poinsettii macrolepis SMITH & CHRAPLIWY 1958 Sceloporus poinsettii polylepis SMITH & CHRAPLIWY 1958
- Described by
- Baird & Girard
- Moved to another genus · since it was first described
- No
- Described in
- 1852
- Type locality
- USA
Keeping one
21.5 in × 21.5 in × 21.5 in(55 × 55 × 55 cm)
Minimum length × width × height, for one animal. Bigger is always better.
The standard sizes ground species at 4 × 4 × 2.5 and climbing species at 4 × 2.5 × 4 times snout-vent length.
Recorded both on the ground and climbing, so this is the larger of the two rules in every dimension.
Lives on rock, so stable hard surfaces and basking ledges suit it.
Mindestanforderungen an die Haltung von Reptilien (Sachverständigengutachten), German Federal Ministry for Nutrition, Agriculture and Forestry, Animal Welfare Division, 10 January 1997. The standard states these floor areas are recommendations rather than binding limits.
From this animal’s own snout-vent length of 5.5 in (137 mm), at 4 × 4 × 4 times it, following the German federal welfare standard — how this is worked out.
In a laboratory thermal gradient this species settled at 91 °F (32.9 °C).
Preferred body temperature, recorded in a laboratory gradient where the animal could choose freely. A measurement of the animal, not a setting for a thermostat.
Feeding
A prey item should be no wider than the space between the animal's eyes.
Widely used across reptile husbandry references. The stated reason is that the gap approximates the width of the throat, so wider prey is associated with impaction. This is established practice, not a measurement.
9kJ per day
Worked out for an animal of 73 g, the heaviest recorded for Crevice Spiny Lizard — so it is the top of the range, not a figure for a particular animal. Weigh yours and the number will be lower.
An upper estimate, not a feeding target, and not veterinary advice. The equation covers only what an animal burns staying alive, so a growing, gravid or recovering animal needs more — and it was measured on wild animals, which move far more than one in an enclosure. Body condition and a vet who knows the species are what a feeding decision should rest on. Where this comes from.
What nobody knows
These are not gaps in our research. No scientific dataset records them for this species — and saying so is information you cannot get from a reference that simply leaves a field out.
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Length nose to tail · greatest recorded
- — Female length · mean, nose to tail
- — Length nose to tail · adult male mean
- — Length nose to tail · adult mean
- — Largest male · snout to vent
- — Largest female · shell length
- — Largest male · shell length
- — Hatchling length · nose to tail
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · adult female, mean
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How the young develop
- — Gestation or incubation
- — Hatchling length · smallest recorded
- — Hatchling length · largest recorded
- — Age at first breeding · female
- — Mature from · youngest recorded
- — Mature by · oldest recorded
- — Size at maturity · smallest recorded
- — Size at maturity · largest recorded
- — Colour on the back
- — Pattern on the back
- — Pupil
- — Red List criteria
- — Home range · largest recorded
- — Active in
Others in Phrynosomatidae
Take this data
Everything on this page is available as data under CC BY 4.0 — use it freely, credit it, no permission needed.
This species as JSON · the whole dataset
Cite this page
The Reptile & Amphibian Encyclopedia (2026). Sceloporus poinsettii. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/sceloporus-poinsettii
@misc{sceloporus_poinsettii_2026,
title = {Sceloporus poinsettii},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/sceloporus-poinsettii}
}Sources
- Meiri, S. (2024). SquamBase — a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography. Public domain (CC0).
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.
- Catalogue of Life (dataset 3LR), used under CC BY.
- AnAge, Human Ageing Genomic Resources (de Magalhães et al.), used under CC BY 3.0.