Butterflies: a feast for more than eyes

Sandy, Bedfordshire What are they tasting, and what makes them dab their egg on one particular leaf above all others?Day by day, summer has been eating its way through the nasturtium at the back door. Over the past fortnight, I have conducted my own leafwatch. Victorian naturalists used systematic, meticulous, studies to gain insights: I’m looking in my lunch break. Even so, during these half-hour snatches, I’ve discovered a tiny something that contradicts an authoritative textbook.W