Butterflies the ‘perfect indicators’ of environmental health, but you’ll have to count them first

If you have seen the flutters of butterflies converging on Brisbane this spring, you will know there can often be too many to count — but that is exactly what locals are being encouraged to do.

Brisbane’s Big Butterfly Count comes amid swarms of migrating caper white butterflies, known scientifically as Belenois java.

“We want to investigate our biodiversity and butterflies are perfect bioindicators,” project…