Butterfly makes fast flight from Asia via NT

Say hello to one of Australia's latest migrants. Ten years ago the Tawny Coster didn't get a mention in the weighty Butterflies of Australia. In 2010 it had moved south to Singapore. Five years ago it was noticed floating about in the Northern Territory.

Now the species Acraea terpsicore (aka A.violae) can be seen dancing among grasses and weeds in the Townsville Common. Haven't seen any signs of tension among other butterflies. There's a lesson somewhere in there.