Vacciniina optilete
In 3 days ~10% in a week ~30%
Agriades optilete, the cranberry blue, is a butterfly of the family Lycaenidae. It is found in north eastern Europe, the Alps, North Asia, Japan, Korea and north western North America. The length of the forewings is about 14 mm. The butterfly flies from June to August depending on the location.
The larvae feed on Vaccinium oxycoccos, Empetrum nigrum, bilberry and other cranberry and Empetrum species. L. optilete Knoch (79 b). This species is quite out of place in the present group of Lycaena in characters as well as habits, and would be much better placed in a later group than here where it stands in Staudinger-Rebel's Catalogue. Both wings very broad and their outer margins strongly rounded. Male above very dull dark violet-blue, sometimes with a broader black margin, sometimes without black margin. In the female only the basal half of the upperside is dusted with glossy blue scales. Underside dirty dust-grey, the ocelli very large, often distorted; only the anal area of the hindwing beneath bears orange spots before the margin, from which they are separated by two large round dots with metallic centres. More in the North, in Central and North Europe as... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 2 | Denali National Park | 🇺🇸 United States | |
| 3 | Vanoise National Park | 🇫🇷 France | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Cranberry Blue sighting in Bavarian Forest National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 964th most-seen of the 1115 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.
July
In that month about 10% of wildlife watchers report a Cranberry Blue in Bavarian Forest National Park on a given day, against under 5% in August to June, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Cranberry 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.
4th of 4
Of the 4 parks where we can rate Cranberry Blue sightings, Bavarian Forest National Park ranks 4th at under 5%. The best odds are in Hohe Tauern National Park (Austria, about 20%), Denali National Park (United States, about 10%) and Vanoise National Park (France, about 10%).
Same family: Lycaenidae
The closest relatives of the Cranberry Blue that you can see in Bavarian Forest National Park (family Lycaenidae, Gossamer-winged Butterflies) are Common Blue (about 30%), Small Copper (about 20%) and Holly Blue (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cranberry Blue is recorded against all the insects logged in Bavarian Forest National Park (10 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.
