Hello,
I used to do this easily, but since the recent layout change of GBIF I can’t manage to do it anymore. I used to open a page for a species and go on metrics to see on which months the species is the most commonly observed, which can still be done now using the metrics interface of the new layout. However, what I can’t do anymore is add a location, like a continent, to only include the data of this location for the month metrics, because the month occurency of species change between locations in the world. For instance, I want to see in which months C. pallens is the most represented in Europe, I can get the month graphic, but I see no way to add a filter which would make the graphic only include the data from Europe like I was able to do before GBIF changed the layout.