Clarification: there are at least 2 species of worm called "red wiggler". One is an earthworm (Lumbricus rubellus), closely related to nightcrawlers ( Lumbricus terrestris), and of no use to home vermiculture.
The other is a dungworm (Eisenia foetida also spelled 'fetida'). This species will tolerate indoor temperatures too warm for most worms. It's also more tolerant of the ammonia and other toxins found at such high concentrations in compost heaps and vermiculture bins. Thiis is the red wiggler that you want, and is the most popularly used.
They can be collected from farmyard manure heaps, but many other critters may also come with them. Some are soilborne pests that will harm your plants, some will harm your worms, and some microbes may just infect humans....
Best bet: contact someone already doing this and get a starter culture of Eisenia foetida from them.
The other is a dungworm (Eisenia foetida also spelled 'fetida'). This species will tolerate indoor temperatures too warm for most worms. It's also more tolerant of the ammonia and other toxins found at such high concentrations in compost heaps and vermiculture bins. Thiis is the red wiggler that you want, and is the most popularly used.
They can be collected from farmyard manure heaps, but many other critters may also come with them. Some are soilborne pests that will harm your plants, some will harm your worms, and some microbes may just infect humans....
Best bet: contact someone already doing this and get a starter culture of Eisenia foetida from them.