Ebony Jewelwing damselfly Many odonates—dragonflies and damselflies—are sexually dimorphic. In fact, sometimes the males and females are so different you'd swear they didn't belong to the same species. These Black-winged damselflies are iridescent jewels that patrol just about every stream in our area. The female, with the white spots at the top of her wings, is in the foreground. Her would-be mate, who's quite different from her in terms of color, is inching up from behind in the hope that she'll recognize him as one of her own—and superior father material.