A traditional pattern that will work on rivers and lakes - the 'Winged March Brown'
Materials in the order they are tied:
Hook: Wet-fly #14 - #10
Thread: Bennechi 12/0 Olive
Rib: Fine silver or copper
Tail: English Partridge
Body: Hare’s Ear
Hackle: English Partridge
Wing: English Partridge
1) Catch in the thread and tie in the rib
2) Bring the thread behind the rib and tie in the tail fibres.
3) With the tying thread returned behind the rib, noodle the hare’s ear around the thread.
4) Dub the body with gradual taper and then wind the rib forwards.
5) Catch in the hackle by its tip:
6) Wind the hackle, tie off and remove excess:

A useable flymph pattern already…
7) Select a pair of wings; match them up…
8) …and tie them in. Remove the excess:
9) Build a neat head and varnish: