Facebook post by University of Helsinki

30 years ago, researchers introduced some butterfly larvae on a small island in the Åland islands. Little did they know that within the butterfly larvae there nested two other insect species and a bacterial symbiont. Although the original research project failed, the relocated species persisted, offering the ground for investigating how an entire insect community could be affected by one introduction event.
Like matryoshka dolls: one insect species introduced decades ago to a small island had an effect on several insect populations | University of Helsinki l.facebook.com

Researchers thought 30 years ago that they just introduced some Glanville fritillary butterfly larvae on a small island in the Åland Islands, Finland. Little did they know that within the butterfly larvae there nested two other insect species and a bacterial symbiont.