Roundtail Horned Lizard

Closest Relatives at Big Bend National Park

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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	20–30%
2	Big Bend National Park	🇺🇸 United States	10–20%
3	Cumbres de Monterrey National Park	🇲🇽 Mexico	Insufficient data

Quick answers

What are the chances of seeing a Roundtail Horned Lizard in Big Bend National Park?

About 19% of visitor-days record a Roundtail Horned Lizard sighting in Big Bend National Park, based on 51 observer-days of citizen-science data from GBIF.

When is the best time to see Roundtail Horned Lizard in Big Bend National Park?

September has the highest sighting rate for Roundtail Horned Lizard in Big Bend National Park in our monthly data.