巣 - nest, rookery, hive

empty nest

nest; rookery; breeding place; hive

old haunts; former homes

ovary

leaving the nest

to build a nest; to nest

den; haunt; hangout; nest; lair

blue jay (Cyanocitta cristata)

homing instinct

ovaritis

Eurasian jay (Garrulus glandarius)

homing (instinct)