Help me identify (non-experts welcome)

[upupa-epops]

There is this: https://forum.inaturalist.org/t/add-comments-or-wiki-like-functionality-on-taxa-pages-to-discuss-identification-and-other-relevant-issues/91/17
and https://forum.inaturalist.org/t/expand-the-similar-species-tab-into-an-editable-identification-guide/13890