If I find any other terminology for a butterfly’s egg, I’ll write another short post on it. So far, the only one that’s been suggested and that I also found, was in this illustration in a Japanese childrens book. It uses the term tamago (たまご）, which is the generic term for egg.
I learned some new words from having read this short entry. One, sakusen, which seems to be the topic of this book, means “operation, strategy or plan.” So it’s about the swallowtail butterfly’s (アゲハチョウ・agehacho) strategy for protecting her eggs. As illustrated, the mother swallowtail lays her on the backside of the leaf (happa no ura・はっぱの うら）. Another term is teki/てき/enemy which I should have picked up from watching the Taiga Drama, Tenchijin. And why does the mother swallowtail do this? It’s in this little phrase: みつからないよう/mitsukaranaiyou/so that it will not be found.