“…It is presumed to be a costly behavior, with adult reproduction suffering a trade-off in energy needed for adult flight apparatus construction and flight fuel versus ovarian development, or oogenesis (Rankin and Burchsted, 1992;Crowley and McLetchie, 2002;Ronce, 2007). The cost is usually manifested, especially in wing dimorphic species, as decreased reproductive output caused by a prolonged pre-oviposition period, decreased longevity, and decreased lifetime egg production (Dingle and Arora, 1973;Walters and Dixon, 1983;Roff, 1984;Zera, 1984;Zera and Mole, 1994). Physiological management of the migration-reproduction trade-off often includes a package of adaptations referred to as the oogenesis-flight syndrome, which was taken for many years as a fundamental trait of insect migrants (Johnson, 1969;Rankin et al, 1986Rankin et al, , 1994Colvin and Gatehouse, 1993;Keil et al, 2001;Gu et al, 2006;Lorenz, 2007).…”