nesting finches

Finches need to make a nest or just foster parenting?

I just bought a pair of finches, but we want them to breed. Nest is a necessary or just encourage your partner.

No, I read online that do not need the nest, only to breed, but sometimes have a mind of its own, my finches kept building nests in the food dish. So I had no choice but to let them have a nest and reproduce. But the birds sleep on perches in their Most of the nests are only for reproduction

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