Another bonus brown
The Brown argus is a small butterfly that is on the wing throughout the summer, between May and September. Adults feed on Common Rock-rose, which is also the caterpillars’ foodplant, together with various species like Crane’s-bills.
The Brown argus has bronzy-brown upperwings with an orange band of spots across the edge of each wing. It is very similar to the female Common Blue, but tends to be smaller, with no hint of blue in the wings.