Bactrocera tryoni
In 3 days ~10% in a week ~20%
Bactrocera tryoni, the Queensland fruit fly, is a species of fly in the family Tephritidae in the insect order Diptera. B. tryoni is native to subtropical coastal Queensland and northern New South Wales. They are active during the day, but mate at night. B. tryoni lay their eggs in fruit. The larvae then hatch and proceed to consume the fruit, causing the fruit to decay and drop prematurely. B. tryoni are responsible for an estimated $28.5 million a year in damage to Australian crops and are the most costly horticultural pest in Australia. Up to 100% of exposed fruit can be destroyed due to an infestation of this fly species. Previously, pesticides were used to eliminate B. tryoni from damaging crops. However, these chemicals are now banned. Thus, experts devoted to B. tryoni control have transitioned to studying this pests' behaviors to determine a new method of elimination.
Adult B. tryoni flies are reddish brown in color, have distinct yellow markings and are typically 5–8 mm in length. Adults hold their wings horizontally when walking and flick them in a specific, characteristic manner. The wingspan of B. tryoni ranges from 4.8 to 6.3 mm. B. tryoni may be mistaken... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Queensland Fruit Fly sighting in Melbourne on a given day, based on 28 verified sightings from GBIF citizen-science data. It is the 341st most-seen of the 875 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.
February and April
In those months about 10% of wildlife watchers report a Queensland Fruit Fly in Melbourne on a given day, against under 5% in March and May–January, the lowest months.
Yes
Of the 3 cities where we can rate Queensland Fruit Fly sightings, Melbourne has the highest daily chance: under 5%. Next come Brisbane (Australia, under 5%) and Sydney (Australia, under 5%).
GBIF citizen-science records
It is estimated from how often the Queensland Fruit Fly is recorded against all the insects logged in Melbourne (28 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.
