What are the chances of seeing an Eastern Black-tailed Rattlesnake in Guadalupe Mountains National Park?
Possible
About 30% of wildlife watchers report an Eastern Black-tailed Rattlesnake sighting in Guadalupe Mountains National Park on a given day, based on 24 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 7th most-seen of the 21 reptiles we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
When is the best time to see an Eastern Black-tailed Rattlesnake in Guadalupe Mountains National Park?
August
In that month about 60% of wildlife watchers report an Eastern Black-tailed Rattlesnake in Guadalupe Mountains National Park on a given day, against under 5% in March–April, October and December–January, the lowest months. That is one of Guadalupe Mountains National Park's wettest months, with about 50 mm of rain against 10 mm in April.
What time of day is best to see an Eastern Black-tailed Rattlesnake?
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Eastern Black-tailed Rattlesnake sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Is Guadalupe Mountains National Park the best place to see an Eastern Black-tailed Rattlesnake?
Among the best
Of the 3 parks where we can rate Eastern Black-tailed Rattlesnake sightings, Guadalupe Mountains National Park ranks 2nd at about 30%, level with the leaders once rounded. The best odds are in Big Bend National Park (United States, about 30%).
Which relatives of the Eastern Black-tailed Rattlesnake live in Guadalupe Mountains National Park?
Same genus: Crotalus
The closest relatives of the Eastern Black-tailed Rattlesnake that you can see in Guadalupe Mountains National Park (genus Crotalus, Rattlesnakes) are Western Diamondback Rattlesnake (about 30%) and Rock Rattlesnake (about 20%), with each one's daily chance of a sighting.
Where does the Eastern Black-tailed Rattlesnake sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Eastern Black-tailed Rattlesnake is recorded against all the reptiles logged in Guadalupe Mountains National Park (24 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
