[TN-Bird] Abrupt End To Nesting Season

In the spring I reported how the darn English Sparrows had taken over my 
Bluebird nest box. I quickly found them and tore their nest out. After some 
advise I received here I placed a piece of 2 by 4 on the inside bottom of the 
box to make it shallower. That seemed to do the trick as the Bluebirds returned 
and proceeded to have 3 broods. I had been keeping tabs on the latest brood of 
4 and they were almost ready to leave the nest. Yesterday I noticed the nest 
material sticking out of the entrance and knew what was up. The nest was 
cleaned out. I have seen it happen before but not here at this location. I have 
heard that squirrels will raid the nest and of course snakes but no way of 
telling for sure. I did find a few feathers on the ground.
I have seen nest boxes with predator guards on the entrance, making it an 1 1/2 
think or so. Do these help?

Tim Riddle
Overton Co.

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