Pterygota Winged Insects
pterygota Potamanthus luteus has yellowish unspotted Winged Insects wings, and abdomen barely mar·ked. Local. MA YFLIES (JI/IJ()I)!! dijJ!crlllJl ORDER EPHEMEROPTERA A small species, 1000ISmm long, but dis• tinctive in having only 2 wings and 2 tails. A small and distinctive group, with an un• The female> have yellowish f,'ont mar'gins. usual life-cycle. Unique among insects, they Known to fisher'men as 'pond olives'. have 2 adult phases, moulting again after they Habitat Still and slow-flowing waters. attain the winged state. A sub-adult emerges Status and distribution Common and from the aquatic nymph and takes flight, usu• widespread thl'Oughout. ally hiding among vegetation; this phase is Season 5-10. dull-coloured, with opaque wings, and is known to anglers as the 'dun'. Within hours L/JiJel/lerei/a i,~lli/a the dun moults into the sexually mature A medium-sized species, about 20mm long, adult, which has brighter colours, translu• with a reddish-brown body, reddish-tinged cent wings, and longer tails - the 'spinner'. wings, and 3 tails. The hindwings are small Mayflies are recognizable by the wings, but clearly visible. which are held vertically Habitat Around fast-flowing, well-oxy• above the body, always genated, well-vegetated streams. unfolded; the very shore Status and distribution Widespread antennae; and the 2 or 3 and locally frequent in suitable habitat. long tails. The nymphs Season 4-9. always have 3 tails, even if Similar species the adult has 2. Despite £. notata is yellowish-brown not red, with their name, the short-lived dark stripes and dots under the abdomen.
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