A joke comes to mind here;
A man was stranded on a deserted island for over 25 years all alone. When rescued the rescuers asked what the little building was on the hill. To which he replied "That is where I go to church"! The rescuers then asked what was the BIG building up on the other hill? He replied "that is where I used to go to church before we got to arguing all the time"!

The worms that you have found sounds like pot worms. When pot worms are found in abundance, it usually mean that something is wrong in the bin.

But the OP said they fond the transparent worms in the outdoor compost bin.

I have noticed that the very young compost worms are a bit translucent but they do have a pink tinge to them. And even some of the bigger red worms have a bit of translucence to them and I've noticed that the tail end of em sometimes seem as if they gotta go if you know what I mean. As for adult size transparent worms, I don't know. Do you mean transparent as in no pink/red to em like they are colorless clear and you can see stuff moving through them? or is it more that they have the pink/red tinge but are a bit translucent and you can kinda see that there is stuff in them?

Pot worms are very small and white/transparent. They may be an indication that something is slightly off in the bin but not necessarily wrong enough to cause panic.

So sorry to take so long to reply to this. Now, 7 months later, and a lot of reading and research I have figured out that the first worms that I got when I went to the Vermicomposting workshop are Eisenia foetida. The EF have very pronounced stripes.
The worms that I found later outside in the GG bin are Lumbricus rubellus. It appears that the LR worms are pinkish and have a trasparenacy that the EF worms don't. As the LRs grow older that transparency lessens.
Is there a preference between these two? Or do they pretty much have the same habits, etc?
(I think I know what the pot worms are. They are the small white worms that seem to appear when there is too much food or moisture).
Thanks for the replies!
JT

From Wikipedia: Lumbricus rubellus is a species of earthworm that is related to Lumbricus terrestris. It is usually reddish brown or reddish violet, iridescent dorsally, and pale yellow ventrally. They are usually about 1 to 4 inches (25 to 105 mm) in length, with around 95-120 segments. It is one of the species of earthworm commonly claimed for used in vermiculture although each instance, on proper inspection, has been found to be Eisenia fetida.