then what causes them to lock onto one food form and feed so selectively?

Your complete guide to the mayflies of the Mataura | Chris Dore

They say that 10% of anglers catch 90% of the fish. This is never truer than when fishing the Mataura river in Southland. Sourcing high in the Eyre Mountains, South of Queenstown, the Mataura wi...

The Spent Spinner | The Mataura River Series by Chris Dore

Note: This is part 5 of 5 of our Mataura River series In Norman Marshäó»s book äóÖTrout Stream Insects of New Zealandäó» (Millwood press, 1983), he aptly describes the appearance of the spinner i...