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Old July 30th, 2015, 12:16 AM posted to rec.outdoors.fishing.fly
Bob[_4_]
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Posts: 18
Default Hatch Freq. On Western Rivers: How Often ?

Hi,

An entymology question.

Those really big Mayfly hatches they have on many of the western rivers:

How often do they occur ?
Every week, or...?

How long do they generally last ?

Thanks,
Bob