Summer Fishfly
Daily sighting probability ~10% · With luck
at Acadia National Park

In 3 days ~20% in a week ~50%

23 Verified sightings at Acadia National Park From 2019 to 2026
73 In all 4 parks
July Best month
☀️🌙 Day & Night When it's spotted

About the Summer Fishfly

Chauliodes pectinicornis known as Summer fishfly, is a species of fishfly from North America. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Congaree National Park 🇺🇸 United States
~20%
2 Acadia National Park 🇺🇸 United States
~10%
3 Shenandoah National Park 🇺🇸 United States
~10%
4 Great Smoky Mountains National Park 🇺🇸 United States
~10%

Cities Where Found

# City Country Daily sighting probability
1 Boston 🇺🇸 United States
<5%
2 New York City 🇺🇸 United States
<5%
3 Washington 🇺🇸 United States
<5%
4 Toronto 🇨🇦 Canada
<5%

Before you go

What are the chances of seeing a Summer Fishfly in Acadia National Park?

With luck

About 10% of wildlife watchers report a Summer Fishfly sighting in Acadia National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 116th most-seen of the 405 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.

When is the best time to see a Summer Fishfly in Acadia National Park?

July

In that month about 20% of wildlife watchers report a Summer Fishfly in Acadia National Park on a given day, against under 5% in September to June, the lowest months.

What time of day is best to see a Summer Fishfly?

Between 8 and 11 pm

Across all the parks we cover, that three-hour window holds the most Summer Fishfly sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.

Is Acadia National Park the best place to see a Summer Fishfly?

2nd of 4

Of the 4 parks where we can rate Summer Fishfly sightings, Acadia National Park ranks 2nd at about 10%. The best odds are in Congaree National Park (United States, about 20%).

Where does the Summer Fishfly sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Summer Fishfly is recorded against all the insects logged in Acadia National Park (23 verified sightings from 2019 to 2026), 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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