Woodland and open sub-alpine grassland in the Foret du Risoux near Les Rousses was rich in butterflies. The Adonis Blue and Large Ringlet were frequent here especially in the more open areas whilst three different fritillaries nectared on the flowery species-rich grassland.
Adonis Blue (male) above and below
Adonis Blue aberration showing pale-coloured striations replacing the marginal lunules
Large Ringlet (female) with conspicuous silver band on the underside of the forewing
Amongst the fritillaries, the False Heath Fritillary was the scarcest with the Meadow and Lesser Marbled more frequent.
False Heath Fritillary (both above)
Meadow Fritillary (both above)
Lesser Marbled Fritillary (three above)
A solitary Purple-edged Copper made a brief appearance, the brightly coloured dark bordered upperside seen clearly when in flight. This is a scarce butterfly.
A sheltered woodland glade near Divonne-le-Bains had several species including Silver-washed Fritillary, Chalk-hill Blue, Wood White and Large Skipper. Ringlets were locally frequent in damp pasture elsewhere.
Silver-washed Fritillary (male) with very broad silver bandings on the hind-wing underside
Chalk-hill Blue male
Wood White, a delicate weak-flying butterfly
A Small Heath frequenting rough grassland at Lac de Bellefontaine