Xenodon neuwiedii
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~10% in a week ~20%
Xenodon neuwiedii, also known commonly as Neuwied's false fer-de-lance, is a species of snake in the subfamily Dipsadinae of the family Colubridae. The species is native to eastern central South America. The specific name, neuwiedii, is in honor of German naturalist Prince Maximilian of Wied-Neuwied.
Xenodon neuwiedii is found in extreme northeastern Argentina, southeastern Brazil, and southeastern Paraguay. The preferred natural habitat of Xenodon neuwiedii is forest. Xenodon neuwiedii is terrestrial and diurnal. Xenodon neuwiedii preys predominately upon toads, but also upon other frogs.
Xenodon neuwiedii is oviparous. Boulenger, G.A. (1894). Catalogue of the Snakes in the British Museum (Natural History). Volume II. Containing the Conclusion of the Colubridæ Aglyphæ. London: Trustees of the British Museum (Natural History). (Taylor and Francis printers). xi + 382 pp. + Plates I–XX. (Xenodon neuwiedii, p. 148).
Freiberg, M. (1982). Snakes of South America. Hong Kong: T.F.H. Publications. ISBN 0-87666-912-7. 189 pp. (Xenodon neuwiedii, p. 113... Wikipedia →
Recording0:17
Brazil · 2025
© cliobr · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 2 | Itatiaia National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | São Paulo | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Neuwied's False Fer-de-lance sighting in São Paulo on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 20th most-seen of the 23 reptiles we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
January and February
In those months about 10% of wildlife watchers report a Neuwied's False Fer-de-lance in São Paulo on a given day, against under 5% in March to December, the lowest months. Those are among São Paulo's wettest months, with about 200 mm of rain a month against 35 mm in August.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Neuwied's False Fer-de-lance sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only São Paulo, in our data
São Paulo is the only city on Wallace's Line with enough records to rate Neuwied's False Fer-de-lance sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Colubridae
The closest relatives of the Neuwied's False Fer-de-lance that you can see in São Paulo (family Colubridae, Colubrid Snakes) are Pampas Snake (about 10%), Brazilian Slug-eating Snake (about 10%) and Military Ground Snake (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Neuwied's False Fer-de-lance is recorded against all the reptiles logged in São Paulo (6 verified sightings), 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.
