Reptilia · Squamata
Callopistes maculatusGravenhorst, 1838
Spotted False Monitor
Photograph by Nicolás Villaseca Merino, CC BY-SA, via iNaturalist
A ground-dwelling, day-active, omnivorous lizard from the Neotropic region, reaching 173 mm snout to vent.
Once published as Callopistes palluma — those names reach this page.
Reptilia › Squamata › Teiidae › Callopistes
- Grows to
- 173mm
- greatest recorded
- Eats
- Omnivorous
- Active
- Diurnal
- Lives up to
- 5years
Longer than 86% of all species in Teiidae 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 52.4 to 614 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
35 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
- 2015
- Population trend
- Decreasing
The animal itself
- Limbs
- Four legs
- Venomous
- No
- Fangs
- None
- Longest recorded life
- 5years
- Preferred body temperature · chosen in a laboratory gradientmeasured
- 39.2°C
- Body temperature when active · measured in the wild
- 37.95°C100 °F
- Body temp in the wild · mean, when active
- 36.9–39°C98–102 °F
Slavens and Slavens 1999
mean body temperature of active individuals in nature
body temperature of active animals in nature
Size
- Length snout to vent · greatest recorded
- 173mm6.75 in
- Length snout to vent · adult female mean
- 115.5mm4.5 in
- Largest female · snout to vent
- 115.5mm4.5 in
- Body mass · greatestcomputed
- 163.4g5.8 oz
max 173 mm SVL (Feldman et al. 2016)
snout-vent length; the source column mixes this with straight carapace length
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Omnivorous
- How it hunts
- Active foraging
- Active
- Diurnal
- Where it lives
- Terrestrial
- Habitat
- Desert, Shrubland
- Biome
- Mediterranean
- Region
- Neotropic
- Mainland or island
- Mainland
- Elevation · above sea level
- 270–2500m
- Range size
- 101,764km²
lizards (Zug et al. 2001, Reyes-Olivares et al. 2020), mostly Herbivorous but also takes vertebrates (Greene 1982), insects and reptiles (Donoso-Barros 1966), arthropods (Vidal and Labra 2008), "insects, seeds, lizards (Liolaemus), small snakes (Tachymenis), and rodents (Abrothrix olivaceus and Octodon degus)." Faundez 2012, see also Crespo and Koch 2015, Castro et al. 1991 (plants, arthropods, rodents - mostly insects, also reptiles), small vertebratres and carrion (Demangel 2016)
Vidal and Labra 2008, Demangel 2016
max 2500 (Demangel 2016), max 2940 (Mella Avila and Nunez 2022)
Breeding
- Reproduction
- Oviparous
- Average clutch
- 9eggs
- Eggs or young per clutch
- 6–12eggs
maximum 12 (Demangel 2016)
Naming and history
- Suborder
- Sauria
- Infraorder
- Laterata
- Subspecies
- Callopistes maculatus maculatus GRAVENHORST 1838 Callopistes maculatus atacamensis DONOSO-BARROS 1960 Callopistes maculatus manni DONOSO-BARROS 1960
- Described by
- Gravenhorst
- Moved to another genus · since it was first described
- No
- Described in
- 1838
- Type locality
- Chile
Keeping one
2 ft 3 in × 2 ft 3 in × 17 in(69 × 69 × 43 cm)
Minimum length × width × height, for one animal. Bigger is always better.
The standard sizes ground-dwelling species at 4 × 4 × 2.5 times snout-vent length.
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 6.75 in (173 mm), at 4 × 4 × 2.5 times it, following the German federal welfare standard — how this is worked out.
In a laboratory thermal gradient this species settled at 103 °F (39.2 °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.
18kJ per day
Worked out for an animal of 163 g, the heaviest recorded for Spotted False Monitor — 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 · snout to vent
- — Hatchling length · nose to tail
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Body mass at hatching
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How the young develop
- — Gestation or incubation
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches in a year
- — Clutches a year · fewest
- — Clutches a year · most
- — First breeds from · youngest recorded
- — First breeds by · oldest recorded
- — 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
- — Sex decided by
- — Red List criteria
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Active in
Others in Teiidae
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). Callopistes maculatus. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/callopistes-maculatus
@misc{callopistes_maculatus_2026,
title = {Callopistes maculatus},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/callopistes-maculatus}
}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.