is this even supposed to work for collection projects? i don’t see any actual links on collection project pages that would take you to such a page. (just because the system does something if you type in a particular URL doesn’t necessarily mean that it’s intended to work.)
the API does provide this information. for example: https://api.inaturalist.org/v1/observations/histogram?project_id=bees-of-south-and-southern-africa&interval=month&date_field=created (you can change the parameters in the URL to get the information you’re most interested in…)
here’s a page that will get and present that information as a bar chart and table: https://jumear.github.io/stirfry/iNatAPIv1_observation_histogram?project_id=bees-of-south-and-southern-africa&interval=month&date_field=created.
or you can work with the data in whatever tool you prefer.
- here’s an explanation of how to work with this kind of data in Excel: https://forum.inaturalist.org/t/using-excel-api/22378#step-5-optional-column-chart-of-observations-by-day
- here’s an example of an R script to work with that sort data: https://forum.inaturalist.org/t/1m-observations-this-month/2582/4
- you can search for the forum for more examples: https://forum.inaturalist.org/search?q=http%3A%2F%2Fapi.inaturalist.org%2Fv1%2Fobservations%2Fhistogram