Brown Drake

Telling it apart

• A big mayfly, size 10–12, brown-tan body noticeably darker than the Green Drake.
• Three tails, cream-tan mottled wings.
• A burrowing nymph with tusks and feathery gills, like Hexagenia — but in sand and fine gravel rather than deep silt.
• Hatches in one short burst right before dark, and it's over almost as soon as it starts.

The burrowing genus, sand edition

The Brown Drake shares the genus Ephemera with the Green Drake and Hexagenia: a burrowing nymph, equipped with digging tusks and feathery gills to circulate water through its burrow. But where Hexagenia needs deep silt and the Green Drake needs fine gravel, the Brown Drake settles for sand and very fine gravel — a slightly more tolerant habitat, found in seams a touch faster than its cousins prefer.

Look for it in sandy-bottomed widenings, often just downstream of a riffle rather than in the deep, slow pools typical of Hexagenia water.

A short, explosive hatch

Unlike a caddis that trickles off all evening, the genus Ephemera emerges in a mass, tightly synchronized burst: thousands of nymphs leave their burrows almost at once, often in the ten to twenty minutes before dark.

That synchrony dilutes the risk for any one insect — too much prey at once for predators to make a dent — but it leaves an angler an extremely short window. Miss those twenty minutes and the evening's hatch isn't just slower, it's over.

The cousin that shows up a bit later

On a river where both overlap, the Green Drake tends to come off a bit earlier in the evening than the Brown Drake, which waits until light is genuinely low. Colour and bottom type help sort them out: paler and over gravel, it's probably the Green Drake; darker and over sand, later in the evening, it's the Brown Drake.

In practice the distinction matters less than being on the water and ready at the right moment — the two fish almost identically.