Rhithrogena Germanica - March Brown Trout Flies

For centuries the March brown dun has figured prominently in angling writing, but it is rarely if ever seen on the majority of rivers and streams and does not appear on stillwaters. The March brown is "probably the most famous of all British mayflies", having been copied by anglers to catch fish for over 500 years

In the British Isles, the range of R. germanica includes the River Tweed and River Don in Scotland, the River Coquet in England, the River Wye in Wales and the River Liffey in Ireland. Typically these are  fast-flowing northern and western rivers with stony beds are not found in Southern UK. In late March and early April the main hatches occur, often with duns coming off in waves spread over two or three hours. It is unusual for one of these bursts of activity to last much more than fifteen minutes so be prepared as the fishing can be mad when this hatches occur.

The March Brown Fly Details

Family Ephemeroptera
Body Length  
Body Length 0.5" 12mm
No of Tails 2
Usual Hatch Time Evenings
Body Colour Dark Brown
Wing Colour Mottled Brown

 

rhithrogena germanica fly hatches & imitation
Rhithrogena germanica hatch chart

Nymphs, Wet Fly, Dry Fly and Spinner Imitation Patterns

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Barbless Bead Head Gold Ribbed Hares Ear Grhe

Barbless Bead Head Gold Ribbed Hares Ear Grhe£1.10  (2)

Available in Fly Size(s)
10, 12, 14, 16.

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Barbless Hares Ear Nymph Grhe

Barbless Hares Ear Nymph Grhe£1.10

Available in Fly Size(s)
10, 12, 14.

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Barbless March Brown Northern Spider Trout Fly

Barbless March Brown Northern Spider Trout Fly£1.10  (1)

Available in Fly Size(s)
12, 14

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Bead Head  Hares Ear Rough Body

Bead Head Hares Ear Rough Body£0.90  (9)

Available in Fly Size(s)
10, 12, 14, 16.

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Beadhead  Nymph Gold Ribbed Hares Ear Grhe

Beadhead Nymph Gold Ribbed Hares Ear Grhe£0.90  (12)

Available in Fly Size(s)
10, 12, 14, 16.

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Flashback Hares Ear Grhe

Flashback Hares Ear Grhe£0.75  (2)

Available in Fly Size(s)
10, 12, 14, 16.

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Greenwells Glory

Greenwells Glory£1.00  (8)

Available in Fly Size(s)
12, 14, 16, 18, 20

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Kites Imperial

Kites Imperial£1.00  (3)

Available in Fly Size(s)
14, 16, 18, 20

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March Brown

March Brown£1.00  (4)

Available in Fly Size(s)
12, 14, 16.

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March Brown Fly Selection

March Brown Fly Selection£6.00  (1)

10 flies
sizes 14,16
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March Brown Northern Spider Trout Fly

March Brown Northern Spider Trout Fly£1.25  (3)

Available in Fly Size(s)
12, 14

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March Brown Nymph

March Brown Nymph£0.75  (1)

Available in Fly Size(s)
10, 12, 14.

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Silver March Brown

Silver March Brown£0.75

Available in Fly Size(s)
10, 12, 14.

   

Specific March Brown Dry Flies

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March Brown

March Brown£1.00  (4)

Available in Fly Size(s)
12, 14, 16.

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March Brown

March Brown£0.75  (1)

Available in Fly Size(s)
10, 12, 14

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March Brown Nymph

March Brown Nymph£0.75  (1)

Available in Fly Size(s)
10, 12, 14.

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Silver March Brown

Silver March Brown£0.75

Available in Fly Size(s)
10, 12, 14.

For centuries the March brown dun has figured prominently in angling writing, but it is rarely if ever seen on the majority of rivers and streams and does not appear on stillwaters. The March brown is "probably the most famous of all British mayflies", having been copied by anglers to catch fish for over 500 years

R. germanica was first described by Alfred Edwin Eaton based on a single male imago collected from the River Rhine at Laufenburg, Switzerland. Its current distribution in Switzerland only extends to a few tributaries of the Rhine.

Rhithrogena germanica is widespread across Central and Northern Europe. It is under threat across Europe, and Great Britain may be a stronghold for the species.  In the British Isles, the range of R. germanica includes the River Tweed and River Don in Scotland, the River Coquet in England, the River Wye in Wales and the River Liffey in Ireland. Typically these are  fast-flowing northern and western rivers with stony beds are not found in Southern UK. In late March and early April the main hatches occur, often with duns coming off in waves spread over two or three hours. It is unusual for one of these bursts of activity to last much more than fifteen minutes so be prepared as the fishing can be mad when this hatches occur.

The nymph is a stone clinger and not readily available to trout except during a hatch. March brown nymphs prefer the fast-flowing runs and glides, unlike the agile-darters which are usually found in greatest concentration near the margins or in weed beds. In deeper water trout seem to take mainly the nymphs as they ascend and struggle through the surface film, whereas in shallow stretches they are often seen rising to the floating dun. Use a size 12 March Brown nymph or March Brown Spider or as an alternative size 12 Gold-ribbed Hare's Ear nymph, fished just below the surface. These are is usually an effective imitation when march browns are hatching. You can frequently see large quantities of March Brown spinners during the day.

The emerging adults are vulnerable to predators, and so their emergence is very fast; the whole process of moulting and taking flight can take as little as 30 seconds!