Our knowledge of several of them is incomplete and more records are needed. Click here for a recording form. A 1960s record in north-west Islay is the only possible sighting. This migrant has reached Islay in major invasion years, e.g. 1947 and again more recently in 1992. Most records come from the Rinns and around Port Ellen and Port Askaig.
Migrants arrive in some years.
Small White Pieris rapae Not as common as the Large White but liable to turn up anywhere. Green-veined White Pieris napi Common and widespread, May to August. Recorded on two occasions during the 1970s, then not until the late 1990s, when there were two more records. Common Blue Polyommatus icarus Widespread in lowland areas, especially on the limestone and dunes. The only 'Blue' on Islay.