Identification key to male darter dragonflies

Common Darter (Sympetrum striolatum)	Red-veined Darter (Sympetrum fonscolombi)	Yellow-winged Darter (Sympetrum flaveolum)
Mature males abdomen orange-red; frons with black line across top, not continuous down sides of eyes; outer sides of legs striped yellow; pterostigma brown	Mature males abdomen brick red; wings with conspicuous red veins at base, hind wing with yellow patch at base; pterostigma yellow with black border	Mature males abdomen orange-red; wings with characteristic broad yellow-amber patch at base; pterostigma brown