Cos4Bio is an online platform that integrates observations on biodiversity from various citizen observatories, potentially an enormous number of observations that are of interest to the expert community. The portal allows citizen science experts to view and identify all the observations in one place. Once identified, the observation returns to the citizen observatory portal where it was reported for final validation according to their specific algorithm. More information: https://cos4cloud-eosc.eu/services/cos4bio/ Cos4Bio has been developed by Bineo Consulting in the Cos4Cloud framework. Infographic designer: Lucas Wainer.