Why this page exists: A player needs the two similarly named collection achievements separated and the tracking issue honestly scoped.
Do not merge the two requirements
The official Steam achievements page uses different verbs. One tracks collection ownership; the other tracks winning runs that include each animal.
A full collection can therefore satisfy Gotta Collect 'Em All without proving that Animal Collector has recorded every required win.
The tracking report remains unresolved
In the linked discussion, a player says only the last animal appeared to count. The developer reply focuses on adding better visibility for per-animal wins, which confirms a tracking-clarity problem but does not document a shipped fix.
Use an external checklist for now
Until the game exposes a reliable per-animal history, keep a manual list of completed winning runs. This is a practical recordkeeping suggestion, not a claim that it repairs achievement state.