Identification key to male hawker dragonflies

Brown Hawker (Aeshna grandis) Large Hawker, body brown, wings tinted amber	Vagrant Emperor (Hemianax ephippiger) Medium-sized Hawker, body yellow-brown, abdomen not waisted, bright blue band near top of abdomen, eyes brown	Lesser Emperor (Anax parthenope) Medium-sized Hawker, body greenish-brown, abdomen waisted, bright blue band near top of abdomen, eyes green