yes. i think that’s just the result of some identifiers focusing specifically on getting unknown to at least a high level taxon like plants (see https://forum.inaturalist.org/t/amount-of-unknown-records-is-decreasing/8594).
what didn’t make sense to me at first was the small but significant number of bird observations going to casual. my first thought was that maybe there are zoos or aviaries that people visit a lot, or maybe some folks are purposely looking for captive or poached birds, but i later realized it’s just a case where veteran birders are noting birds that they observed on site, without loading photos or sounds as evidence. so for example, you can tell that kueda is one of these birders: https://jumear.github.io/stirfry/iNat_obs_counts_by_iconic_taxa.html?user_id=kueda.