Order Odonata is divided into sub order Anisoptera (Dragonflies) and Zygoptera (Damsel flies).  Both are predatory insects, and hawk their prey on the wing.  All the below pictures were taken with Canon EOS 300D and 100mm f2.8 macro and fill in flash unless otherwise stated:

Dragonfly
Dragonfly
Dragonfly eating another
Damselfly (Ischnura elegans) catching land bug
Damselfly
Damselfly

kennethgilpin@lookingcloser.net