Hi @salix-babylonica
There is a very large international iNaturalist network. This is its strength as it allows taxa experts in one country to assist another. Particularly important with invasive species, and sharing of biodiversity data, via the GBIF. iNaturalist is very popular in Canada, Australia, New Zealand, United Kingdom, Other parts of Europe, South America, South Africa and parts of Asia. See this link: https://www.inaturalist.org/sites/network