Brimstone Moth
...that the Brimstone Moth has a variable life cycle of either one generation a year or two generations every three years?
...that the <b id="mwA5E"><a class="mw-redirect" href="./Brimstone_Moth" id="mwA5I" rel="mw:WikiLink" title="Brimstone Moth">Brimstone Moth</a></b> has a variable <a href="./Biological_life_cycle" id="mwA5M" rel="mw:WikiLink" title="Biological life cycle">life cycle</a> of either one generation a year or two generations every three years?