Seems like a reasonable title, yes. I don’t think GBIF is a larger community. Unless you’d say that a library is a community of all the authors featured in it.
Found this https://bugguide.net/node/view/11181 45k is kinda low in comparison knowing how often it’s used, but probably the need of “good” photos drives many people away
they have .069 million (exact 698,196) users compared to 1.7 million (exact number 1,740,344) on inaturalist.
Considering that ebird is focused on one group - albeit a popular group , it is an awesome number.
They also have, consistently, been doing a multitude of events in many many places. Workshops, seasonal “Big something or great something events”, and country specific “units”
In India these are the two biggest online platforms
First is the India Biodiversity Portal - 16600 users (inaturalist India has 16,914 users)
The second is multiple websites under the broad banner of Bioatlas of India
However this is a closed network - users are not visible to each other and there is no way for a user to interact with other users or edit their submissions, or even see their own submissions in one shot. Only thing is that the information is available publically.
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Apart from these there are multiple list serve type / google group places but many are not “open” information sources.
There are many other platforms/communities that share some similarities with iNaturalist, especially if you consider some Reddit or Facebook groups dedicated to naturalist-y topics. Many years ago I started a list, but it has been a few years now since I’ve made any effort to update it. If anyone wants to update it, you should have the edit power. Observation.org and iSpot are the two most like iNat in their global, all-taxa scope.
While the 1.7 million number is technically accurate, it is a little selective in my mind. It represents every person who has ever used the site in roughly 10 years, with a significant number of those folks having used it once and then never returned.
A more true measure is likely the active users, which hover around 300k a month.