The Eurasian Tree Sparrows (ETS) tried again and entered the nest box. We knew we had to come up with a solution, fast, before the Chickadees would give up again. So...we put on our thinking caps, er, hats.
The female watched as Dan covered the 1 1/8" hole with a sleeve of PVC pipe that had a hole just over an inch. The ETS cannot get through this size hole! But, can the Chickadees?
OH, YES THEY CAN!!
We have watched the pair display, mate and add to their nest! The ETS still pop by to cause some upset, but they cannot get in. They are using another box they commandeered. At least now, the Chickadees have a real fighting chance of raising a brood.