The nests usually take 3-7 days to build, and when finished they are 3-5.5 inches across, with an inner diameter of 2.4-2.8 inches and depth of 1.6-2.8 inches. It’s rare for a junco to reuse a nest.

Do juncos return to the same nest?

Generally monogamous, juncos return to the same territory year after year. Yet each year, they build a new nest, and the female will often start several before finishing the one in which eggs are ultimately laid. … They will re-nest three, four, even five times over the course of a summer.

How long do juncos stay in the nest?

Incubation is by female, about 11-13 days. Young: Both parents feed the nestlings. Young leave the nest 9-13 days after hatching.