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Opération Papillons aims to improve scientific knowledge on butterflies. The data collected over the long term should help measure the effects of human activities on these species.

Specific actions

Participants carry out inventories of butterflies in their gardens or on their balconies, noting the maximum number of individuals seen together for each species. At the end of each week of observation, the data are entered on the observatory website.

Project created
Mainland France

Type of project : Field, online

Participation period : All year

Level of involvement : Case by case



Photo credits (c)Prisca
Photo credits (c)Prisca

Project description

This observatory is part of the Vigie Nature network.

Opération Papillons was co-founded in 2006 by the Noé Association and the Muséum national d’histoire naturelle to study butterfly populations and their trends. The project is a citizen science project open to all. No prior knowledge is needed to participate. Butterflies can be observed over one or more weeks depending on your availability. You must then enter the data on the observatory website. You should note only the maximum number of individuals of any species seen simultaneously over one week of observation.Since 2006, data from more than 12,000 gardens have been collected and more than 1,500,000 butterflies have been counted.

Participant testimonials

The participation

Required equipment

Connected computer


Angélique Daubercies

Angélique Daubercies

Chargée des Observatoires de la biodiversité


Angélique Daubercies

Anne Dozières

Anne Dozières

Directrice de Vigie-Nature

Muséum national d’Histoire naturelle (MNHN)


Anne Dozières