It is fascinating observing "intelligent" behaviour in other creatures. I watched a Cabbage White butterfly looking for cabbages or similar in my garden, where there are none. It flew between the peas, the leeks, and a sedum, all the same sort of colour as cabbages, but decided they weren't what it wanted. It settled on the radishes (same family) but rejected them, too. Went round again to check, and then left. (My intelligent decision was to continue not growing brassicas, except the winter sort.) It didn't need much brain, so probably not many genes, to do what it was doing, but it did it very well. I can think of people who show less intelligence.

Penny