Counting butterflies

SURELY this is just another example of CaRT wasting money and effort of volunteers. There are other butterfly and moth species which use the nettle as a host on which to lay their eggs so why not include them? Asks Bill Ridgeway.

There's a lot to be said for the adage 'horses for courses'. In this case I'm sure the organisation 'Butterfly Conservation' knows what it's doing and has a far wider experience in its field.

More reliable way

Its members look after butterfly and moth habitats. They not only count butterflies and moths but also go out counting their eggs which, as they don't move, is a far more reliable way of understanding numbers.

Given the highly questionable efforts of CaRT to produce reliable visitor statistics I would suggest its results on Comma butterflies will also be highly questionable.

CaRT should master managing the structure of its waterways before going off doing other things.