Crotalus tzabcan
Silhouette: Bill Bouton (source photo) & T. Michael Keesey (vectorization) · PhyloPic
In 3 days ~40% in a week ~70%
Crotalus tzabcan, the Yucatán neotropical rattlesnake, is a species of pit viper in the family Viperidae. It was previously thought to be a subspecies of Crotalus durissus, until Wüster elevated it to species status in 2005. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calakmul Biosphere Reserve | 🇲🇽 Mexico |
More parks will be added in future updates.
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Zoo Pilsen | 🇨🇿 Czechia | |
| 2 | Croco Cun Zoo | 🇲🇽 Mexico | |
| 3 | Biouniverzoo | 🇲🇽 Mexico | |
| 4 | La Aurora Zoo | 🇬🇹 Guatemala |
Possible
About 20% of wildlife watchers report a Yucatán Neotropical Rattlesnake sighting in Calakmul Biosphere Reserve on a given day, based on 27 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 13th most-seen of the 46 reptiles we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
August–September and November–December
In those months about 30% of wildlife watchers report a Yucatán Neotropical Rattlesnake in Calakmul Biosphere Reserve on a given day, against about 10% in January–April and June, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Yucatán Neotropical Rattlesnake sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Calakmul Biosphere Reserve, in our data
Calakmul Biosphere Reserve is the only park on Wallace's Line with enough records to rate Yucatán Neotropical Rattlesnake sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Yucatán Neotropical Rattlesnake is recorded against all the reptiles logged in Calakmul Biosphere Reserve (27 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.
