Where can i buy gusano rojo in the US?

You can find _gusano rojo_ (red worms) in some Mexican grocery stores or online retailers. Alternatively, you could use a common earthworm (Eisenia fetida), which can be found in compost piles or soil. Note that it's important to confirm the species of worm before consumption, as some worms can be harmful. If you're unsure about the species, it's best to avoid eating it.