but this might be a bird's idea
of a storage unit.
It's definitely not a nest
(flower added by the photographer ;)
The RG removed the front in the spring
to deter House Sparrows
and minimize the war with wrens.
DETERRING HOUSE SPARROWS AND EUROPEAN STARLINGS
As a nest box monitor, your goal is to provide a safe environment for local cavity-nesting species to breed. We strongly encourage that you do not allow House Sparrows or European Starlings to breed in your nest boxes. We recommend that you take measures to prevent them from breeding in your boxes. Unfortunately, a completely sparrow-proof nest box does not exist. --- nestwatch.org