Orange Featherleg 
Orange Skimmer 
Orange Threadtail 
Orange-backed Threadtail 
Orange-spotted emerald 
Orange-tailed Marsh Dart 
Orange-winged dropwing 
Orchithemis xanthosoma 
Oreaeschna dictatrix 
Orthemis levis 
Orthemis sp 
Orthetrum julia 
Orthetrum melania 
Orthetrum taeniolatum 
Oxyallagma dissidens 
Pacific Forktail 
Pacific Spiketail 
Paddle-tailed darner 
Painted Grasshawk 
Painted skimmer 
Paiute Dancer 
Palaeosynthemis nigrostigma 
Pale-legged Dasher 
Pale-spotted emperor