In Africa there is a killer Queen
Engaging in a spot of filicide;
Where two sub-species meet in zones between
Their habitats, all male offspring have died.
This means that cross-breeding has not survived;
A natural culling swiftly brought about
By spiroplasma microbes that have thrived.
No matter how much the females put out
This new species will flourish like a painful drought.
This is a Spenserian stanza inspired by recent research, which found that all male offspring of two interbreeding sub-species of the African Queen tropical butterfly have been dying before they can even hatch. This means that with no male butterflies to mate with, the female butterflies that arise from this interbreeding will eventually die out.
These premature deaths of the male butterflies are caused by the microorganism spiroplasma, which causes approximately 100% mortality in male eggs and first instar larvae. However, the mortality is not affected by the infection status of the male parent.
An audio version of this poem can be heard here.