Cinnabar moth/Ragwort

Caterpillars on Ragwort. The ragwort which is poisonous to horses is regularly "controlled" to prevent ingestion. The caterpillars of this moth only feed on Ragwort so you see the problem. I beleive that in New Zealand they use the caterpillars to control Ragwort. Any way I have had a go at this image added a touch more contrast and a little sharpening. Have I done enough or could it be improved further?

[IMG]http://i189.photobucket.com/albums/z307/50crates/IMGP08092ps-1.jpg[/IMG]

Yes a tighter crop would be better. Thank you for your comments