Since it started in 2012, the LesHerbonautes website (http://lesherbonautes.mnhn.fr ) has demonstrated its ability to enroll enthusiastic volunteers in label transcription of herbarium specimens. Thanks to scientific communication on biodiversity, gamification, and discussion between members, a community of 2500 citizen scientists have shared more than 2 million contributions on 160 000 specimens. The redundancy, training and communication among members ensure a good overall quality of transcription. While operating this crowdsourcing platform, we have seen several ways in which we can broaden the activity. Firstly, as the proposed tasks might attract people interested in zoology as paleontology, the parameterization of the questions was improved so as to address those fields and propose relevant specimen images. In the herbarium field, volunteers can be involved in image quality control during the digitization phase preceding label transcription. The Recolnat project was an opportunity to experiment with this. Since herbarium labels are often multilingual, it matters that we reach an audience not limited to the French language. After partial success with mixing different languages on the same website on flora Argentina, it seems that different websites, like Die Herbonauten-Pilot, that are run separately with independent community management on the same open source code base is a more effective solution. To extend the federation beyond sites sharing common principle requires establishing standards and protocols for interoperability. Different projects are hosted by the same website, and we saw that community involvement is higher when there is a visible link between the transcription and a specific research project. This is an argument in favour of proposing different missions with more creative workflows that focus on specific label information or even specimen observations.
