I thought you plucked birds not animals, shows how much I know
Birds are animals aren't they?
So are us Humans (Homosapiens).
So why do we say humans and not homosapiens?
Human doesn't sound like it's short for Homosapien.
Human comes from the adjective of Homo sapien, which is latin for wise man, Homo being man, the adjective was Humanus, and translated to french, humain, then english Human.
It just fell into noun usage as it was probably just easier and sounded better, no real reason.
We are not pure homo sapien though, we are at least 4% neanderthal, possibly more we dont know, Only africans are pure homo sapien, they are missing all neanderthal genes, although neanderthals are a homo species, so humanus and human would still apply.
as for marmite, never tried it.