鳥の巣

1. Origins, structure, and basic meaning

• Structure: 鳥の巣 is read as とりのす and is a noun phrase linking 鳥 and 巣 with の for a nest built by birds to hold eggs or raise young.
• Basic usage: Mark its location in 木に鳥の巣ができている and the object avoided in 鳥の巣には触れない.

2. Common pitfalls and similar expressions

• Relation expressed by の
  • の links the bird to the kind or owner of the nest; the words are not arbitrarily compressed into 鳥巣.
• Response to a fallen nest
  • The example reports that the fallen nest was left untouched and that facility staff were notified.