Nesting box designed for Western Bluebirds with wire around entry that discourages other birds from using it. Oak savanna in the background.
Closeup of the sign on a Western Bluebird nesting box indicating that the nesting box is for Western Bluebirds.
Backside of a Western Bluebird nesting box. The backside has come open, revealing an old nest inside.
Throughout #RoundValley regional preserve, there are Western Bluebird nesting boxes. Western Bluebirds are in a population decline because non-native birds out-compete them for their preferred nesting sites. these boxes are designed to compensate for that, but this one is broken. 🧵+