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Mayfly - Wikipedia ... Mayfly
Trout. Blue-winged Olive flies is a collective term used by anglers in fly fishing to identify a broad array of mayflies having olive, olive-brown bodies and bluish wings in their adult form. Sometimes referred to as BWO, a wide array of artificial flies are tied to imitate adult, nymphal and emerging stages of the aquatic insect.
Ephemera danica can reach an imago size of 15–20 mm (0.6–0.8 in) in males, while females are larger, reaching 16–25 mm (0.6–1.0 in). This mayfly, with its characteristic markings and three tails ( Cerci ), is the most commonly seen of British Ephemeridae. Imago wings are translucent with dark veining, while in subimago they are dull and ...
Hexagenia limbata. (Serville, 1829) [1] Hexagenia limbata, the giant mayfly, is a species of mayfly in the family Ephemeridae. It is native to North America where it is distributed widely near lakes and slow-moving rivers. [2] The larvae, known as nymphs, are aquatic and burrow in mud and the adult insects have brief lives.
It has been observed that the species have their wings upright after mating, which fish tend to eat while ignoring the mayflies that have outstretched wings. [2] Both hatching and mating occur at night. It hatches from mid-June to mid-July and the nymphs emerge from the sand and silt bottoms of streams where trout are.
The wings are usually clear with prominent venation although species with variegated wings are known. As in most mayflies, the males have large compound eyes, but not divided into upper and lower parts. Heptageniids breed mainly in fast-flowing streams, but some species use still waters. The nymphs have a flattened shape and are usually dark in ...
Paraleptophlebia submarginata can reach a body length of about 9–12 mm (0.35–0.47 in). These mayflies have a very dark brown body, with a clear darker drawing on the back and transparent wings of about 12–14 mm (0.47–0.55 in), with evident ribs. The front wings are triangular and quite long, while the back wings are much smaller, about ...
Ephemerellidae are known as the spiny crawler mayflies. They are a family of the order Ephemeroptera. There are eight genera consisting of a total 90 species (Merritt & Cummins). They are distributed throughout North America as well as the UK. Their habitat is lotic-erosional, they are found in all sizes of flowing streams on different types of ...