However, a similar species, tropical milkweed (Asclepias curassavica), has been linked to migration pattern disruption ... the leaves on the butterfly weed begin to yellow, and the stems dry ...

A state butterfly may be on the cards ... a row of large yellow spots before a row of smaller yellow spots. The underwings have a similar pattern. The females are usually larger.

There isn’t a big difference between a butterfly ... and is yellow and purple. Or the chocolate moth, which is dark brown with light, coloured stripes and a delicate lacy pattern on the edges ...