BLUEBIRD BOXES AREN'T JUST FOR BIRDS ANYMORE!
(Red Squirrel )
This adorable youngster is an example of why one needs to put a "predator guard" or metal cover around the hole of nest boxes. Bluebird boxes are the perfect size for little red squirrels, thus the birds (and flying squirrels I might add )can lose their home. Note the chew marks around the hole...just the right size to SQUEEZE through...lol
Have a good one...