Speckled Dun

Speckled Dun

Callibaetis pictus

Daily sighting probability <5% · Rare
at Monterrey

In 3 days ~10% in a week ~20%

5 Verified sightings at Monterrey
December Best month

About the Speckled Dun

Callibaetis pictus is a species of small minnow mayfly in the family Baetidae. It is found in Central America and North America. In North America its range includes all of Mexico, the northern, and southwestern United States. It can be distinguished from other species in its range by its pale, usually W-shaped dorsal marking on tergite 6. Very similar markings are almost always present on tergites 5 and 9 as well. 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 Mexico City 🇲🇽 México
<5%
2 Monterrey 🇲🇽 México
<5%
3 San Diego 🇺🇸 United States
<5%
4 San Francisco 🇺🇸 United States
<5%
5 Los Angeles 🇺🇸 United States
<5%

Before you go

What are the chances of seeing a Speckled Dun in Monterrey?

Rare

Under 5% of wildlife watchers report a Speckled Dun sighting in Monterrey on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 365th most-seen of the 413 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.

When is the best time to see a Speckled Dun in Monterrey?

December and January

In those months about 10% of wildlife watchers report a Speckled Dun in Monterrey on a given day, against under 5% in February to November, the lowest months. Those are among Monterrey's driest months, with about 20 mm of rain a month against 200 mm in September.

Is Monterrey the best place to see a Speckled Dun?

Among the best

Of the 5 cities where we can rate Speckled Dun sightings, Monterrey ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Mexico City (México, under 5%).

Where does the Speckled Dun sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Speckled Dun is recorded against all the insects logged in Monterrey (5 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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