Christopher: There is A LOT of bad information out there concerning earthworms. I breed Red Wrigglers, African Nightcrawlers and European Nightcrawlers. All three of these worms are used in vermicomposting. I feed all three of these worms to my amphibians and reptiles - including my garter snakes - and have not had any problems with them. I will not feed any Canadian Nightcrawler though, as these worms are normally WC and I won't feed WC feeders to my pets any more.
All of my bins I compost "safe foods". Bascially, everything comes out of the fridge or from my cardboard/paper recycle bin that is appropriate to use with the worms.
I do not feed any "outside" materials, with the exception of my African Nightcrawlers, I will give them dried leaves but only if they've been baked in the oven first (my reject leaf litter pile).
The only dirt I add to my compost bins are either coco-fiber or peat moss, as both substrates are safe to use with most types of amphibians. If I were to use any sort of "soil" from say outside, I would be sure to sterilize it prior to adding it to my tubs.
The earthworm you want to avoid is "Bimastrus foetida" (aka the manure worm), this worm is usually used by people dealing with large amounts of cow manure. This worm has a yellow line on it's body, and tastes terrible enough that fish will reject this feeder.
All types of earthworms will produce a foul taste, it's a defence mechanism.
Not all types of herps will eat earthworms though. I find that dessert herps (beardies, leos) do not like earthworms and tree frogs do not like earthworms. They show interest in the prey, but usually spit it out, I think it's a texture thing as it's not a typical feeder that they would naturally be eating. There are exceptions to every group though, so you will have to try them out on your pets and see how it goes.
Earthworms can also be used for human consumption, and I know that when people are using them for food, they will normally remove the worms from the tub and put them in a (ventilated) tupperware container filled with moistened cornmeal for about two days before cooking with them. They do this to purge the worms gut of any soil that would make them gritty when you are eating them.





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