Wingspan: 55–60 mm
Flight period: in one extended generation from June to October
Larval host plants: species in the grass family (Poaceae)

The Large woodland grayling (Hipparchia fagi) is a large butterfly with a dark brown upperside of the wings and a broad band consisting of a series of connected white spots. A light band runs along the outer edge of the fore and hind wings, and the white stripe becomes progressively more blurred toward the apex, yellowish to brown. On the forewings, on the light band there are two black eyespots, the upper one larger with a white center, the lower blurred and without white. On the hindwings there is only one eyespot, at the bottom of the light band. The outer edge of the hindwings is jagged, and the waviness is further emphasized by alternating bands of white and black hairs that continue along the edge of the forewings. The female differs from the male by a more contrasted pattern and a larger thorax.

The undersides are camouflaged and help the Large woodland grayling blend with the bark of trees on which it likes to perch. A smeared white band of irregular shape on the underside of the hindwings on the inner side is bounded by a pronounced black line. At the light band, in the lower outer corner of the wings, there is also a blurred eyespot. The light band continues along the entire outer edge of the forewings, at the top it is interrupted by an oval eyespot.

The Large woodland grayling is a distinctly thermophilous species, which explains its distribution. It is common only in the western and southwestern Slovenia, while in the central part it is rather rare, and its occurrence is very scattered. It lives in warm light deciduous forests, at forest edges, along forest paths and in shrubs.

Because it is widely distributed and common in the Slovenian Littoral, it is not endangered in Slovenia, although in the central part it is actually very rare. Small and isolated populations in central Slovenia are particularly threatened by afforestation with conifers.