I’m wondering if there might be a glitch in the implementation of this? For example, this search:
https://www.inaturalist.org/observations?hour=9&order_by=observed_on&subview=table&taxon_id=141481
appears to select all observations observed between 09:00 and 10:59 in the observer’s time zone. So specifying a single hour seems to return data for two hours.
If I change the hour=
parameter to 9,10
I get three hours of data.