Brown Stag Beetle

Brown Stag Beetle

Ryssonotus nebulosus

Daily sighting probability ~10% · With luck
at Auckland

In 3 days ~10% in a week ~30%

18 Verified sightings at Auckland
19 In all 2 parks From 2019 to 2026
January Best month
🌅 Crepuscular When it's spotted

About the Brown Stag Beetle

Ryssonotus nebulosus is a beetle of the family Lucanidae, and the sole member of the genus Ryssonotus (often misspelled as "Rhyssonotus"). It is found in Queensland and New South Wales, Australia, as well as introduced into New Zealand. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Royal National Park 🇦🇺 Australia
~10%
2 Blue Mountains National Park 🇦🇺 Australia
~10%

Cities Where Found

# City Country Daily sighting probability
1 Auckland 🇳🇿 New Zealand
~10%
2 Sydney 🇦🇺 Australia
<5%
3 Brisbane 🇦🇺 Australia
<5%

Before you go

What are the chances of seeing a Brown Stag Beetle in Auckland?

With luck

About 10% of wildlife watchers report a Brown Stag Beetle sighting in Auckland on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 291st most-seen of the 689 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.

When is the best time to see a Brown Stag Beetle in Auckland?

December and January

In those months about 10% of wildlife watchers report a Brown Stag Beetle in Auckland on a given day, against under 5% in February to November, the lowest months.

What time of day is best to see a Brown Stag Beetle?

Between 6 and 9 pm

Across all the parks we cover, that three-hour window holds the most Brown Stag Beetle sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.

Is Auckland the best place to see a Brown Stag Beetle?

Yes

Of the 3 cities where we can rate Brown Stag Beetle sightings, Auckland has the highest daily chance: about 10%. Next come Sydney (Australia, under 5%) and Brisbane (Australia, under 5%).

Which relatives of the Brown Stag Beetle live in Auckland?

Same family: Lucanidae

The closest relatives of the Brown Stag Beetle that you can see in Auckland (family Lucanidae, Stag Beetles) are Mitophyllus arcuatus (about 10%) and Syndesus cornutus (about 10%), with each one's daily chance of a sighting.

Where does the Brown Stag Beetle sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Brown Stag Beetle is recorded against all the insects logged in Auckland (18 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.

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