Bluebirds
When it gets really cold bluebirds roost together in a pile using their body heat to help them survive.They arrange themselves so they don't smother and alternate positions within the pile.
posted by manish patwari at 12:09 PM
When it gets really cold bluebirds roost together in a pile using their body heat to help them survive.They arrange themselves so they don't smother and alternate positions within the pile.
posted by manish patwari at 12:09 PM
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