Looks like everyone had fun chasing butts up on the hill. The Plain Plushblue has been seen more often there.
An earlier trip to Ubin with Wong, we also shot it feeding on something on the Crotalaria stem. I wonder if it's unique to this species. Other than the Danainae that feed on the seed pods of this plant, has anyone got any record shots of other butts feeding on this plant's sap?