‘… some male butterflies, including some in the genus Vanessa, are capable of maintaining and aggressively defending territories through purposive behaviors such as patrolling flights and complex interactions in flight with intruders of their own species…’
Bitzer, R.J. and Shaw, K.C. (1979). Territorial behavior of the Red Admiral, Journal of Research on the Lepidoptera 18: 36-49.
While fluttering on the subject, why do we think caterpillars are less disgusting than maggots, yet both are the same stage in insect development?