• The Eurasian wryneck’s offspring hatch asynchronously, and nestlings of different ages may be present in one nest. In the cramped cavity, they sit in a pyramid, beaks pointing toward the center, which open when parents touch them.

The Eurasian wryneck’s typical lifespan is from 7 to 12 years and 6 months, although the maximum recorded lifespan is 10 years, with a theoretical lifespan of from 7 to 9 years and 1 month; the species reaches sexual maturity from 9 months and 1 week to 1 year and 3 months. The embryo develops inside an egg, and the young bird remains in a tree cavity, receiving food from its parents for a period of from 1 day to 2 weeks and 6 days. An adult wryneck can reproduce and forage independently, with the duration of this stage lasting from 1 to 12 years.