A short-lived Butterfly (only 1 to 2 weeks) and threatened by wasps but we always seem to have a few here when summer heats up.
The Sigma 50mm macro lens I reviewed below is an older version; this modern version is more easily obtained but generally pricier (though still reasonable) on the second-hand market. It's a good lens and often overlooked by prospective purchasers of +/- 50mm macros (on a Nikon there are 40,55&60mm options in this general focal length).
At f7.1 ,as in this shot (from the exif data), any macro lens is likely to be excellent and most difference will be colour rendering and the quality of background transitions.