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  1. #1

    Default Timing of Mayfly Hatches

    I am interested in recording the beginning (and end) of Mayfly hatches throughout the UK but especially in the Welsh Borders. I class the beginning to be the time when the Trout start to take the Duns.
    Any information would be appreciated.

  2. #2
    Join Date
    May 2006
    North East Wales
    Blog Entries

    Default Re: Timing of Mayfly Hatches

    It varies from year to year depending on how cold (or not) the Spring has been but around 3rd week of May is a good guide for the Monnow. The hatch goes on into June and starts to tail off around the end of the 2nd week of June. On the neighbouring Troddi it's starts about the same time but is perhaps a little more intense and can be all over by the 2nd week of June.

    On the lower Wye the hatch is much less intense, in fact quite sporadic, but much more extended and duns hatch well into July.
    Last edited by sewinbasher; 15-05-2019 at 04:00 PM.
    “There is no more lovely country than Monmouthshire in early spring. Nowhere do the larks sing quite so passionately, as if somehow inspired by the Welsh themselves. There is a blackbird on every thorn and a cock chaffinch, a twink as they call him there, on every bush...... It moved me profoundly. I had been spared to see another spring, and I thank God for it.”

    Oliver Kite
    “A Spring Day on the Usk”
    A Fisherman’s Diary

  3. #3
    Join Date
    Aug 2012

    Default Re: Timing of Mayfly Hatches

    Today on the Wharfe below Bolton Bridge

    Timing of Mayfly Hatches-60a02b6e-b5e4-4b7d-a36f-6a8adcf97c02-jpg

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