[dice]

From what I have read at a local vendor's
site that specializes in earthworm compost,
earthworm compost tea, and earthworms,
"Red wigglers" are "manure worms", they
seek out manure piles, pastures, and fields
that have had manure spread on them.

If you drop them in your compost or garden
beds, they'll hang around as long as there
is manure there, but they'll freely migrate
elsewhere looking for it if there is none.

Regular yard/garden worms of whatever kind
you find digging around in the yard, underneath
stones or cardboard or whatever after a rain, etc,
generally do fine in worm bins and compost piles.