Chiasognathus grantii
In 3 days ~70% in a week >90%
Chiasognathus grantii is a species of stag beetle found in Argentina and Chile. It is known as Darwin's beetle, Grant's stag beetle, or the Chilean stag beetle. The male's oversized jaws are crucial in its objective to secure a mate. It climbs trees, often climbing many meters, searching for a female. As it climbs and searches for females, it also seeks out other males in the vicinity. When two males meet, they fight. Males use their jaws in combat: they hook them under the opposite beetle's wings, pull up and throw their opponent to the ground (from 20 meters above, as they are in great trees most of the time). Charles Darwin collected the species in Chile during the second voyage of HMS Beagle, and, despite the enlarged mandibles of the males, he noted that the jaws were "not so strong as to produce pain to finger".
Chiasognathus grantii is one of the seven species belonging to the genus Chiasognathus. It belongs to the subfamily Lucaninae, the largest subfamily in the stag beetle family Lucanidae. C. grantii is also known locally as ciervo volante, cantaria, and cacho de cabra in Spanish and llico-llico in the Mapuche language.
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vicente Pérez Rosales National Park | 🇨🇱 Chile |
More parks will be added in future updates.
Likely
About 40% of wildlife watchers report a Chilean Stag Beetle sighting in Vicente Pérez Rosales National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 8 insects we can rate there. Over three days the chance rises to about 70%, and over a week to over 90%, if each day is a fresh chance.
February
In that month about 60% of wildlife watchers report a Chilean Stag Beetle in Vicente Pérez Rosales National Park on a given day, against under 5% in October to December, the lowest months. That is one of Vicente Pérez Rosales National Park's driest months, with about 85 mm of rain against 490 mm in June.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Chilean Stag Beetle 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 Vicente Pérez Rosales National Park, in our data
Vicente Pérez Rosales National Park is the only park on Wallace's Line with enough records to rate Chilean Stag Beetle sightings: about 40% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Chilean Stag Beetle is recorded against all the insects logged in Vicente Pérez Rosales National Park (14 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.
