Roundtail Horned Lizard
Phrynosoma modestum
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyPhrynosomatidae (Frinosomàtids)
- GenusPhrynosoma (Horned Lizards)
- SpeciesPhrynosoma modestum (Roundtail Horned Lizard)
The roundtail horned lizard (Phrynosoma modestum) is a species of lizard in the family Phrynosomatidae. It is one of the smaller species of the horned lizards (genus Phrynosoma). The specific epithet, modestum, is Latin, meaning "modest" or "calm". The species is native to the United States, in western Texas, New Mexico, eastern Arizona, and southeastern Colorado; and eight states in northcentral Mexico, where it is referred to as tapayaxtin. Wikipedia →
Closest Relatives at Cumbres de Monterrey National Park
Mountain Horned Lizard
Phrynosoma orbiculare
Texas Horned Lizard
Phrynosoma cornutum
West Gulf Rough-scaled Lizard
Sceloporus cyanogenys
Rose-bellied Lizard
Sceloporus variabilis
Texas Spiny Lizard
Sceloporus olivaceus
Crevice Swift
Sceloporus torquatus
Graphic Spiny Lizard
Sceloporus grammicus
Minor Lizard
Sceloporus minor
Couch's Spiny Lizard
Sceloporus couchii
Greater Earless Lizard
Cophosaurus texanus
Noble Spiny Lizard
Sceloporus oberon
Pygmy Spiny Lizard
Sceloporus parvus
📅 Monthly Probability
Fewer than 5 records of Roundtail Horned Lizard at Cumbres de Monterrey National Park — not enough to chart months honestly.
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
| # | Park | Country | Probability |
|---|---|---|---|
| 1 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 2 | Big Bend National Park | 🇺🇸 United States | |
| 3 | Cumbres de Monterrey National Park | 🇲🇽 Mexico |