Allan Hopkins:
Green Drake (Ephemera danica), adult mayfly
Allan Hopkins:
Blue-winged Olive Mayfly (Baetis sp.) - adult male 1/2
Allan Hopkins:
Blue-winged Olive Mayfly (Baetis sp.) - adult male 2/2
Allan Hopkins:
Mayfly (Baetidae) - adult
Allan Hopkins:
Large Dark Olive (Baetis rhodani, sensu lato) - adult female
Allan Hopkins:
Yellow May Dun (Heptagenia sulphurea) - adult female