Three of us who visit NWT Thorpe Marshes regularly have been making a point of counting orange-tip butterflies and Norfolk hawker dragonflies.
The idea is to do simple, repeatable ‘transects’, with a view to finding out how these species are doing from year to year. Orange-tips and Norfolk hawkers were chosen as they are key marshland species while also being fairly easy to see, identify and count. We noted what was seen on various sections of the regular circuit around the marshes, alongside simple weather data.
|Orange-tip butterfly, photo by Chris Durdin|
|Norfolk hawker dragonfly, photo by Chris Durdin|
These survey results on their own are little more than snapshots of the nature reserve, we know, but we hope that patterns will begin to show if we can build a data set over a few years.
Chris Durdin leads monthly wildlife walks at NWT Thorpe Marshes. Details of monthly walks on http://www.honeyguide.co.uk/thorpemarshes.htm