The refuge and the second floor were video-taped during the scotophase. The majority of these active animals returned to the refuge in the second half of the night. About half of these insects were counted above and near the head, and a quarter each above and near the torso and legs. The majority of the activated bugs returned to the refuge within the last hour of the night and during dusk, even when the human was still present. Experiments where human breath was introduced into the enclosure indicate that breath plays the major role both in the activation and the attraction of the bugs.
Odors emitted by the rest of the body are of minor importance.
Erratum Last sentence in the first paragraph. This page was last updated on 29.X.1996.