Isoperla grammatica

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  - Order Plecoptera
  - Family Perlodidae
  - Genus Isoperla
  - Species grammatica   Register new user or reset password

The yellow sally (Isoperla grammatica) is an important stonefly for the fly angler, it hatches often in big numbers




Its flying period spans from April to August




Ventral view







Dorsal view detail, notice the typical horseshoe pattern on the head




Detail of the thorax, head and feeding apparatus, ventral view




Abdomen and cerci, ventral view