Monarchs migrate through the southern Great Plains in the spring and fall, and also reproduce in this region in the spring and late summer/early fall. This last generation of monarchs produced in the late summer/early fall is sometimes referred to as the “fifth generation”. The importance of this generation to the overall population is not clear, and not much is known about this cohort. This webinar focuses on what is known and not known about this generation, including the timing of activity, habitat use, tachinid fly parasitism, OE infection, and tag returns from the overwintering grounds in Mexico, with an emphasis on Oklahoma and Texas.