Aegus chelifer
In 3 days ~10% in a week ~20%
Aegus chelifer, is a species of stag beetle found in Indo-Malaya regional countries. It is a widespread species of stag beetles found extensively throughout Indo-Malayan regions, west of Wallace's line, including: India, Bangladesh, Sri Lanka, Andaman and Nicobar islands, Myanmar, Thailand, Singapore, Laos, Vietnam, Cambodia, Malayan peninsula, Sumatra and Borneo. However, the species was recently found from Seychelles and Madagascar as an introduced species. The major cause for this is the dispersal event of large number of floating tree trunks from coastal forests of South East Asia which were carried westward by the South Equatorial Current during 2004 Indian Ocean earthquake and tsunami.
Body length is about 15.0 to 39.5 mm. This species shows great intraspecific variation in their body sizes. Males can be divided into two morphs based on their mandible size as minor and major morphs. A saproxylic species, adults and grubs are generally found in deadwood of broadleaf trees, under bark or fallen tree trunks, in forest patches near human settlements and firewood heaps. Male stag beetles usually involve aggressive behavior using their... Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Aegus chelifer sighting in Hong Kong on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 680th most-seen of the 1125 insects 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.
May
In that month about 10% of wildlife watchers report an Aegus chelifer in Hong Kong on a given day, against under 5% in June to April, the lowest months. That is one of Hong Kong's wettest months, with about 210 mm of rain against 25 mm in December.
6th of 7
Of the 7 cities where we can rate Aegus chelifer sightings, Hong Kong ranks 6th at under 5%. The best odds are in Taichung (Taiwan, about 10%), Jakarta (Indonesia, about 10%) and Kuala Lumpur (Malaysia, about 10%).
Same family: Lucanidae
The closest relatives of the Aegus chelifer that you can see in Hong Kong (family Lucanidae, Stag Beetles) are Prosopocoilus oweni (about 10%) and Prosopocoilus biplagiatus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Aegus chelifer is recorded against all the insects logged in Hong Kong (12 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.
