Unfortunately, both the wren and the sparrow engage in ruthless behav-ior when it comes to nesting. Both species will evict bluebirds and oth-er birds from boxes. They will even destroy eggs and young ...
Unfortunately, both the wren and the sparrow engage in ruthless behavior when it comes to nesting. Both species will evict bluebirds and other birds from boxes. They will even destroy eggs and young.
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