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 →
20–30% of wildlife watchers report a Roundtail Horned Lizard sighting in Guadalupe Mountains National Park, based on 16 days of visitor records from GBIF citizen-science data.
Closest Relatives at Guadalupe Mountains National Park
Texas Horned Lizard
Phrynosoma cornutum
Greater Short-horned Lizard
Phrynosoma hernandesi
Greater Earless Lizard
Cophosaurus texanus
Southwestern Fence Lizard
Sceloporus cowlesi
Ornate Tree Lizard
Urosaurus ornatus
Crevice Spiny Lizard
Sceloporus poinsettii
Common Side-blotched Lizard
Uta stansburiana
Western Earless Lizard
Holbrookia maculata
📅 Monthly Probability
☀️ 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 |
Quick answers
What are the chances of seeing a Roundtail Horned Lizard in Guadalupe Mountains National Park?
About 25% of wildlife watchers report a Roundtail Horned Lizard sighting in Guadalupe Mountains National Park, based on 16 days of visitor records from GBIF citizen-science data.
When is the best time to see Roundtail Horned Lizard in Guadalupe Mountains National Park?
August has the highest sighting rate for Roundtail Horned Lizard in Guadalupe Mountains National Park in our monthly data.