Whilst there's plenty to worry about in Orkney at the moment, what with avian flu killing seabirds and wildfowl, and remembering that the threat of non-native invasive mammalian predators has not gone away, I have had a few bio-security issues of my own recently. Admittedly, minor issues in the grand scheme of things, but if the consequences, however unintended, are unknown, then who knows what is major or minor? A month ago, when we were on holiday in the Cairngorm area, we had a salad accompaniment to one of our evening meals. So far, so healthy, right up to the point where I found a dead larva of a ladybird amongst the greenery. Well, I say 'found', I mean nearly ate. The previous day had been World Environment Day, so perhaps that was on my mind as I casually moved the tiny corpse to the side of my plate and finished the meal. As Megan commented at the time, it was a positive sign that the salad crop had been a home to natural predators rather than innumerable sprayings...