Bronze Bug

Bronze Bug

Thaumastocoris peregrinus

Daily sighting probability <5% · Rare
at San Francisco

In 3 days ~10%

14 Verified sightings at San Francisco
June Best month

About the Bronze Bug

Thaumastocoris peregrinus, the bronze bug, is a true bug first described from Argentina, but is probably native to Australia. The species has been recorded in Africa (Kenya, Malawi, South Africa, Zimbabwe), Europe (Albania, Italy, Portugal, Spain), Middle East (Israel), North America (Mexico, California), South America (Argentina, Brazil, Chile, Paraguay, Uruguay), Caribbean, and New Zealand as a pest of eucalyptus.

Sources: Adult. Body dorsoventrally compressed and elongate. Submacropterous forms are known for both sexes. Male length 2.3–2.9 mm, width 0.7–1.0 mm; female length 2.3–2.7 mm, width 0.7–0.8 mm. Coloration light brown with darker areas; female generally darker than male.

Head broad, strongly projecting anteriorly, with semiglobose projecting eyes. Mandibular plates elongate, conspicuous, strongly recurved anterolaterally. Labium extending to level of fore coxa. Thorax: pronotum with tubercle on anterolateral angle of anterior lobe.

Legs: neither parempodia nor pulvilli present; all tibiae with flattened apical projection, the fossula spongiosa. Tibia of male anteroventrally with three black tubercles, female without such tubercles. Male reproductive... Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Athens 🇬🇷 Greece
~10%
2 Auckland 🇳🇿 New Zealand
~10%
3 Lisbon 🇵🇹 Portugal
<5%
4 Rome 🇮🇹 Italy
<5%
5 Madrid 🇪🇸 Spain
<5%
6 Buenos Aires 🇦🇷 Argentina
<5%
7 Mexico City 🇲🇽 México
<5%
8 Los Angeles 🇺🇸 United States
<5%
9 San Francisco 🇺🇸 United States
<5%

Before you go

What are the chances of seeing a Bronze Bug in San Francisco?

Rare

Under 5% of wildlife watchers report a Bronze Bug sighting in San Francisco on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 443rd most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.

When is the best time to see a Bronze Bug in San Francisco?

Any time of year

In every month with enough records, under 5% of wildlife watchers report a Bronze Bug in San Francisco on a given day, so our monthly data shows no clear season.

Is San Francisco the best place to see a Bronze Bug?

9th of 9

Of the 9 cities where we can rate Bronze Bug sightings, San Francisco ranks 9th at under 5%. The best odds are in Athens (Greece, about 10%), Auckland (New Zealand, about 10%) and Lisbon (Portugal, under 5%).

Which relatives of the Bronze Bug live in San Francisco?

Same order: Hemiptera

The closest relatives of the Bronze Bug that you can see in San Francisco (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Large Milkweed Bug (about 10%), Oleander Aphid (about 10%) and Small Milkweed Bug (about 10%), with each one's daily chance of a sighting.

Where does the Bronze Bug sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Bronze Bug is recorded against all the insects logged in San Francisco (14 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.

← Back to San Francisco