Ceratophora erdeleni
Silhouette: PhyloPic
In 3 days ~50% in a week ~80%
Ceratophora erdeleni, also known commonly as Erdelen's horned lizard or Erdelen's horn lizard, is a species of lizard in the family Agamidae. The species is endemic to Sri Lanka. It has only a rudimentary "horn", that is occasionally missing altogether.
The specific name, erdeleni, is in honor of German biologist Walter R. Erdelen. C. erdeleni is known only from Morningside Forest Reserve in Sri Lanka at an elevation of 1,060 m (3,480 ft). The head of C. erdeleni is oval, and longer than wide. The rostral appendage is oval and rudimentary (less than 18% snout length), and occasionally missing in both sexes. The tympanum is hidden under the skin. A weak dorso-nuchal crest is confined to the neck region. Lamellae under fourth toe are 24–28 in number. The dorsum is yellow, light brown, or reddish brown in color, with 17 broad dark brown crossbands on the body and tail that are separated by light narrow interspaces. The venter is yellowish green. Juveniles are green with black transverse bands.
C. erdeleni inhabits rainforests in the midhills and is arboreal and diurnal. An adult female... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report an Erdelen's Horned Lizard sighting in Sinharaja Forest Reserve on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 18th most-seen of the 32 reptiles we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
June
In that month about 50% of wildlife watchers report an Erdelen's Horned Lizard in Sinharaja Forest Reserve on a given day, against under 5% in July, September and November–January, the lowest months.
Between 4 and 7 pm
Across all the parks we cover, that three-hour window holds the most Erdelen's Horned Lizard sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Sinharaja Forest Reserve, in our data
Sinharaja Forest Reserve is the only park on Wallace's Line with enough records to rate Erdelen's Horned Lizard sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Erdelen's Horned Lizard is recorded against all the reptiles logged in Sinharaja Forest Reserve (12 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.
