grasshopper nematode
... that only the female grasshopper nematode has an eye?
... that only the female <b id="mwAUs"><a href="./Mermis_nigrescens" id="mwAUw" rel="mw:WikiLink" title="Mermis nigrescens">grasshopper nematode</a></b> <i id="mwAU0">(pictured)</i> has an eye?