1The greyish gravid female of certain mayflies.
- Genus Ephemera, family Ephemeridae
- Green and grey drakes were hatching profusely, right along with Hexagenias - all huge, elegant, juicy trout meals.
- The gray drakes were hatching in the shallows, and fish - some big - were rising steadily.
- The grey drakes are in the family Siphlonuridae and can be found in faster water.
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