Increased size and energy reserves in diapausing eggs of temperate Aedes aegypti populations

•It is accepted that Aedes aegypti lacks embryonic diapause, but recent studies challenge this knowledge.•We assess the effects of parental photoperiod on embryonic diapause-related traits.•Short-day photoperiod induced females to lay larger eggs.•Short-day photoperiod induced females to lay eggs with more triglycerides.•Eggs from regions with longer winters had more triglycerides.•Our results demonstrate the capacity of this species to lay diapausing eggs.