Ctenolepisma lineata
In 3 days ~10% in a week ~30%
Ctenolepisma lineatum, the four-lined silverfish, is a species of silverfish of the order Zygentoma. It is rather stouter and less shiny with all the appendages (antennae and 3 "tails") being noticeably longer. The abdomen is often marked with dark brown lines.
This species is native to southern Europe but is now found throughout most of the world, aside from polar and cooler temperate regions (e.g. the British Isles), as an accidental introduction. It is found both indoors and outdoors and can be a nuisance pest.
Recent studies on this species in Europe suggest that, due to speciation, there is enough geographical variation to justify splitting into several species, with one form already having been given specific status as Ctenolepisma almeriense from south-eastern Spain. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States |
More parks will be added in future updates.
No species of the same family or order lives in Acadia National Park, so these are its closest relatives here: other insects.
Rare
Under 5% of wildlife watchers report a Four-Lined Silverfish sighting in Acadia National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 347th most-seen of the 405 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February and March
In those months about 20% of wildlife watchers report a Four-Lined Silverfish in Acadia National Park on a given day, against under 5% in May to January, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Four-Lined Silverfish sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Acadia National Park, in our data
Acadia National Park is the only park on Wallace's Line with enough records to rate Four-Lined Silverfish sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Four-Lined Silverfish is recorded against all the insects logged in Acadia National Park (5 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.
