Glaucopsyche melanops
In 3 days ~10% in a week ~20%
Glaucopsyche melanops, the black-eyed blue, is a butterfly of the family Lycaenidae. It is found in the western part of Southern Europe and North Africa. The length of the forewings is 11–13 mm. The butterfly flies from May to July depending on the location.
The larvae feed on Fabaceae species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monfragüe National Park | 🇪🇸 Spain | |
| 2 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
Rare
Under 5% of wildlife watchers report a Black-Eyed Blue sighting in Sierra de Guadarrama National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 473rd most-seen of the 597 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.
April and May
In those months about 10% of wildlife watchers report a Black-Eyed Blue in Sierra de Guadarrama National Park on a given day, against under 5% in June to March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Black-Eyed Blue sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Black-Eyed Blue sightings, Sierra de Guadarrama National Park ranks 3rd at under 5%. The best odds are in Monfragüe National Park (Spain, about 20%) and Sierra Nevada National Park (Spain, about 10%).
GBIF citizen-science records
It is estimated from how often the Black-Eyed Blue is recorded against all the insects logged in Sierra de Guadarrama National Park (6 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.
