Volucella zonaria
In 3 days ~20% in a week ~40%
Volucella zonaria, the hornet mimic hoverfly, is a species of hoverfly. These flies are capable of buzz pollination. This species is present in most of Europe, in Tunisia, Iran, Russia (to Far East) and in Mongolia. In Great Britain, it was only known from two specimens prior to 1940, so was regarded as rare. Since then, it has become increasingly widespread in many parts of the South and South East England, often in association with parks and gardens, where adults are usually seen visiting flowers. Elsewhere in England, only a few scattered records exist.
These hoverflies usually inhabit meadows close to forests. Volucella zonaria can reach a length of 25 millimetres (0.98 in), with a wingspan of about 40 mm. These very large and wide hoverflies have reddish-brown shining thorax with dark brown marks, and a reddish-brown scutellum. The head shows a waxy yellow face, with yellow forehead and antennae. The large ovoid compound eyes are reddish with dense and short hairs. In the males they are very close to each other, so that the forehead is very narrow. The abdomen is reddish yellow, with two wide black bands. The underside has broad... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Aigüestortes National Park | 🇪🇸 Spain | |
| 2 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 3 | Ordesa y Monte Perdido National Park | 🇪🇸 Spain | |
| 4 | Mercantour National Park | 🇫🇷 France | |
| 5 | Cévennes National Park | 🇫🇷 France | |
| 6 | Triglav National Park | 🇸🇮 Slovenia | |
| 7 | Pyrénées National Park | 🇫🇷 France | |
| 8 | Ecrins National Park | 🇫🇷 France | |
| 9 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 10 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 11 | Wadden Sea National Park | 🇩🇪 Germany | |
| 12 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Manchester | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Amsterdam | 🇳🇱 Netherlands | |
| 5 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 6 | Copenhagen | 🇩🇰 Denmark | |
| 7 | Ankara | 🇹🇷 Turkey | |
| 8 | Liverpool | 🇬🇧 United Kingdom | |
| 9 | Paris | 🇫🇷 France | |
| 10 | Berlin | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Hornet Mimic Hover Fly sighting in Rome on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 106th most-seen of the 289 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report a Hornet Mimic Hover Fly in Rome on a given day, against under 5% in November to April, the lowest months. That is one of Rome's driest months, with about 35 mm of rain against 110 mm in November.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Hornet Mimic Hover Fly sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
27th of 36
Of the 36 cities where we can rate Hornet Mimic Hover Fly sightings, Rome ranks 27th at about 10%. The best odds are in London (United Kingdom, about 30%), Manchester (United Kingdom, about 20%) and Birmingham (United Kingdom, about 20%).
Same family: Syrphidae
The closest relatives of the Hornet Mimic Hover Fly that you can see in Rome (family Syrphidae, Hover Flies) are Marmalade Hover Fly (about 10%), Yellow-Haired Sun Fly (about 10%) and Stripe-Eyed Lagoon Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hornet Mimic Hover Fly is recorded against all the insects logged in Rome (13 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.
