![](https://abcbirds.org/wp-content/uploads/2019/01/BOTW-Homepage-Thumbnail_Mountain-Bluebird_Double-Brow-Imagery_Shutterstock.jpg)
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As a cavity-nester, the Mountain Bluebird is particularly affected by the millions of PVC pipes used as mine claim markers throughout the West.
![](https://i.ytimg.com/vi/Ud1q29BQw44/hqdefault.jpg)
Mountain Bluebird - American Bird Conservancy
![](https://static.mercdn.net/item/detail/orig/photos/m71998936536_4.jpg?1675058170)
クリアランスセール BLUEBIRD【Blue】
![](https://i.ytimg.com/vi/0Bxxb2I6leM/sddefault.jpg)
Mountain Bluebird
![](https://www.allaboutbirds.org/guide/assets/photo/303801421-480px.jpg)
クリアランスセール BLUEBIRD【Blue】
![](https://i.ytimg.com/vi/H17Eh7DMadA/sddefault.jpg)
Mountain Bluebird
![](https://abcbirds.org/wp-content/uploads/2019/01/BOTW-Homepage-Thumbnail_Mountain-Bluebird_Double-Brow-Imagery_Shutterstock.jpg)
Mountain Bluebird - American Bird Conservancy
![](https://static.mercdn.net/item/detail/orig/photos/m71998936536_2.jpg?1674891112)
クリアランスセール BLUEBIRD【Blue】
![](https://static.mercdn.net/item/detail/orig/photos/m71998936536_5.jpg?1675058170)
クリアランスセール BLUEBIRD【Blue】
![](https://i.ytimg.com/vi/Ar-N-ODcAq8/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLC6MWjEuYgXdJf-cz0STD-RFgizLA)
Mountain Bluebird
![](https://static.mercdn.net/item/detail/orig/photos/m71998936536_3.jpg?1674891112)
クリアランスセール BLUEBIRD【Blue】
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