Communities related to r/whatsthisbug, with what each one is for and how it differs. Member figures come from SubMouse's safe-for-work directory.
r/whatsthisbug (about 1.3M members, directory rank #838) is for bug identification — insects, spiders, crustaceans and similar. Non-bug mysteries and spider-specialist rooms fit better elsewhere.
See also whatsthisbug vs whatisthisthing on SubMouse.
Stay on whatsthisbug for arthropod ID. Use whatisthisthing for unknown objects that are not bugs, spiders for arachnid-focused ID and discussion, and whatsthisplant for plant ID.
r/whatsthisbug — Bug identification! All insects, spiders, crustaceans, etc. welcome!
Bug identification! All insects, spiders, crustaceans, etc. welcome!
For the identification of mysterious objects
When to choose it: Mysterious objects that are not bugs.
Why it is here: Paired on whatsthisbug vs whatisthisthing; listed as related. Public description: identification of mysterious objects (about 3.2M members, rank #331).
How it differs from r/whatsthisbug: General object ID versus bug-specific ID.
Spiders
When to choose it: Spider and arachnid ID, photos and discussion.
Why it is here: Listed as related (about 1.2M members, rank #905).
How it differs from r/whatsthisbug: Spider-specialist room versus general bug ID.
What's This Plant
When to choose it: Plant identification rather than insects.
Why it is here: Sibling ID-room neighbourhood (about 1.8M members, rank #600).
How it differs from r/whatsthisbug: Plant ID versus bug ID.
Use the related subreddits finder for r/whatsthisbug: Find related to r/whatsthisbug.
Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-09 UTC); 7-day growth measured from 2026-11-02. Directory rank is listing order. Guide updated 2026-11-07.