Glaucopsyche melanops
In 3 days ~20% in a week ~30%
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 |
With luck
About 10% of wildlife watchers report a Black-Eyed Blue sighting in Porto on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 234th most-seen of the 498 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report a Black-Eyed Blue in Porto 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.
Yes
Of the 3 cities where we can rate Black-Eyed Blue sightings, Porto has the highest daily chance: about 10%. Next come Barcelona (Spain, under 5%) and Madrid (Spain, under 5%).
Same family: Lycaenidae
The closest relatives of the Black-Eyed Blue that you can see in Porto (family Lycaenidae, Gossamer-winged Butterflies) are Lang's Short-Tailed Blue (about 20%), Geranium Bronze (about 10%) and African Grass Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-Eyed Blue is recorded against all the insects logged in Porto (19 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.
