Serrognathus titanus
In 3 days ~80% in a week >90%
Serrognathus titanus is a species of beetle in the family Lucanidae. It was described by Jean Baptiste Boisduval in 1835. Huang and Chen (2013) separated Serognathus from the genus Dorcus by representing morphological characters and DNA analysis.
Males measure 32.0–111.3 millimetres (1.26–4.38 in) including mandibles; females 36.5–54 millimetres (1.44–2.13 in). It has an elongated, somewhat flat body dull black with blackish antennae and legs. Male's antler-like jaws have small teeth along inner edge and a pair of big teeth toward the bottom, and are forked at end. The head of a large male reaches nearly the length of its prothorax and abdomen combined.
Adults can be seen from May to August. They feed on tree juice, especially of Quercus species. Females lay eggs on the underground part of fallen oaks. The eggs hatch in about a month and the larvae feed on rotten wood. The larval period lasts about one year. The complete life cycle can last approximately from 1 to 2 years.
This species is widely distributed in Indonesia, the Philippines, Malaysia, Thailand, Vietnam, Laos, Myanmar, India, Japan, China, Taiwan and Korea. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan | |
| 2 | Khao Yai National Park | 🇹🇭 Thailand | |
| 3 | Kinabalu Park | 🇲🇾 Malaysia |
No species of the same family or order lives in Changzhou, so these are its closest relatives here: other insects.
Likely
About 40% of wildlife watchers report a Titan Stag Beetle sighting in Changzhou on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 2nd most-seen of the 12 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
June
In that month about 80% of wildlife watchers report a Titan Stag Beetle in Changzhou on a given day, against under 5% in July, the lowest month. That is one of Changzhou's wettest months, with about 170 mm of rain against 40 mm in December. November and December have too few records to rate.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Titan Stag Beetle sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 21
Of the 21 cities where we can rate Titan Stag Beetle sightings, Changzhou ranks 3rd at about 40%. The best odds are in Guiyang (China, about 50%) and Chongqing (China, about 50%).
GBIF citizen-science records
It is estimated from how often the Titan Stag Beetle is recorded against all the insects logged in Changzhou (11 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.
