English: Oviposition site choice in a PP female butterfly. Females whose parents were both adapted to Psem are very deliberate in choosing oviposition sites near the ground. In this typical example, a PP female is placed at the top of Psem and immediately dips her antennae towards the leaf, signaling her interest. Rather than laying right away, however, she then drops to a lower leaf and eventually to the ground. After failing to find host material on the ground she flies back to the top of the host and repeats the routine. On her third attempt, she finally locates the base of the plant and begins laying her eggs in an empty seed capsule 1 cm above the ground. This type of exploratory behavior results in the low oviposition site heights characteristic of Psem-adapted butterflies.