In 2015, I added three bird houses to my back yard. Last spring, birds came in and out of the houses. I had thought they were making nests, but none of them stayed very long.
A few days ago, I decided it was time for me to look inside them, so I could remove old nests, if there were any, and get the accommodations ready for this year’s guests. I was very surprised by what I found.
Bird House #1
Bird House #2
Bird House #3
Below is a photo of the three nests side by side.
The third nest was built almost to the ceiling of the birdhouse. That nest was more than six inches high; and the top of it was completely flat. Both of those characteristics surprised and disturbed me.
The holes that give access to these bird houses are very small. Does anyone have an idea why a tiny bird would build a nest that large; a nest which practically fills the bird house? And why would a bird make the top of the nest flat, with no place to lay eggs? Do you know anything about this? I’d appreciate any information you could give me.