2021: Nesting record
This record is based on a video published by Shimesan on YouTube, recorded in Yatsugatake, Nagano prefecture, Japan.
Chipping away at the entrance hole
The bird starts enlarging the entrance hole — the first sign that nesting is coming.
First moss arrives
The first nesting material is brought into the box. Nest building is underway.
🥚 First egg
First egg confirmed.
Last egg (11 in total)
The 11th and final egg confirmed. Full incubation now underway.
🐣 First chick hatched
The first chick is born — 22 days after the first egg was laid, 12 days after the last.
Mum can't cover the chicks
The chicks have grown too large for the mother to sleep on top of them all.
🐥 Chicks' eyes open
The chicks' eyes begin to open.
Chicks start chatting
The chicks become vocal, calling back and forth.
Mum sleeps outside
The mother starts spending nights outside the nest box.
👋 Fledging
The first chick flies the nest 40 days after the first egg was laid, 18 days after the first hatching.