Moth
From Tardis Wiki, the free Doctor Who reference
Moths were a species of insect native to Earth. Oscar Botcherby killed moths using cyanide and took the bodies as he collected them. He used a lamp to attract them before employing cyanide to kill them as it was a quick and kind death. He sought greatly after rare and beautiful types of moths and told his friend Anita to look after his collection as his dying words. (DW: The Two Doctors)
