The Common Crow Butterfly (Euploea corinna) is one of the most frequently-encountered butterflies in the northern parts of Australia. It is very dark brown in colour, appearing almost black, with rows of white spots towards the edge of the wings. Due to its toxic nature (which arise due to the host plants of this butterfly), ingesting a single individual may be enough to induce vomiting in birds – a strong disincentive to eating!
Butterfly species from Family Nymphalidae are numerous and vary considerably in size and colour, but are collectively known as “The Browns”. Various names for sub-families are also commonly used, and include “Satyrs”, “Danaids”, “Nymphs”, “Rustics”, “Emperors”, “Tigers”, “Crows”, “Wanderers”, “Glasswings”, and more.
They are generally medium or large in size, but the most reliable way to identify a Brown is by the underdeveloped forelegs, which are usually held close to the thorax. This gives the butterfly the appearance of having only four legs.