iavhypoB-2 adults are inactive and difficult to arouse for flight (and, when it does, seems to hover and fixate on objects); to jump and fly abnormally short distances; to exhibit slow running or climbing ability and optomotor response; to be debilitated after mechanical shock (especially in adults more than two weeks old).
Gynandromorph analysis of iavhypoB-2 adult behavioral impairments suggests primary focus could be neural.