Good in the evening, or when flies are observed "dipping" over the water.
Tying :-
Hook...........12 - 14 Light Wire
Tag..............Yellow Thread
Tail.............Ginger Cock Hackle Fibres
Body...........Artificial Quill
Wing...........Poly Yarn
Hackle........Ginger Cock
Thorax........Rabbit Fur

Below are three stalking nymphs/bugs for use in clear waters, the tying for all three is :-
Hook.......6 - 8 raptor carp hook
Under body....built up fly tying thread
Over body......artificial quill wrap
Neck......ostrich herl
Bead......3mm tungsten
Finally coat body with Varnish/Hard-as-Nails/UV bug bond etc to protect from fishes teeth!