Cheilosia morio silhouette

Silhouette: PhyloPic

Cheilosia morio

Cheilosia morio

Daily sighting probability ~10% · With luck
at Rotterdam [The Hague]

In 3 days ~20% in a week ~40%

13 Verified sightings at Rotterdam [The Hague]
41 In all 5 parks From 2019 to 2026
August Best month
☀️ Diurnal When it's spotted

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Cairngorms National Park 🇬🇧 United Kingdom
~10%
2 Snowdonia National Park 🇬🇧 United Kingdom
~10%
3 Cévennes National Park 🇫🇷 France
<5%
4 Wadden Sea National Park 🇩🇪 Germany
<5%
5 Pyrénées National Park 🇫🇷 France
<5%

Cities Where Found

# City Country Daily sighting probability
1 Amsterdam 🇳🇱 Netherlands
~10%
2 Rotterdam [The Hague] 🇳🇱 Netherlands
~10%
3 Manchester 🇬🇧 United Kingdom
<5%
4 London 🇬🇧 United Kingdom
<5%
5 Birmingham 🇬🇧 United Kingdom
<5%
6 Moscow 🇷🇺 Russia
<5%

Before you go

What are the chances of seeing a Cheilosia morio in Rotterdam [The Hague]?

With luck

About 10% of wildlife watchers report a Cheilosia morio sighting in Rotterdam [The Hague] on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 140th most-seen of the 355 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.

When is the best time to see a Cheilosia morio in Rotterdam [The Hague]?

April–May and July–September

In those months about 10% of wildlife watchers report a Cheilosia morio in Rotterdam [The Hague] on a given day, against under 5% in June and October–March, the lowest months.

What time of day is best to see a Cheilosia morio?

Between 1 and 4 pm

Across all the parks we cover, that three-hour window holds the most Cheilosia morio sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.

Is Rotterdam [The Hague] the best place to see a Cheilosia morio?

Among the best

Of the 6 cities where we can rate Cheilosia morio sightings, Rotterdam [The Hague] ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Amsterdam (Netherlands, about 10%).

Where does the Cheilosia morio sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Cheilosia morio is recorded against all the insects logged in Rotterdam [The Hague] (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.

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