Siobhan Leachman is a New Zealand citizen scientist, open knowledge advocate, and Wikipedian whose work focusses on natural history. Leachman is a lawyer by background and a self-described "stay-at-home mother of two". Bored after her children began attending kindergarten, she began her volunteer work at the instigation of her sister (rights manager at Te Papa) with the Smithsonian Transcription Center, transcribing diaries and field journals such as those of Vernon and Florence Bailey and categorising bumblebee collections of Arthur Wilson Stelfox. She moved on to volunteer projects with the Biodiversity Heritage Library, Zooniverse, the Australian Museum, and the New Zealand Virtual Herbarium.