A little bluebird puzzle

 I enjoyed the bluebirds through the winters, and I thought I would see even more in spring as they built nests and raised young. I was wrong.

I still see bluebirds. But there are fewer of them now.

The solution to my bewilderment: We have year-round bluebirds in the Piedmont. But bluebirds that breed in the North winter down here. That is, we have two bluebird populations: year-round Georgians and winter visitors. The visitors have packed and gone.

• Source: Terry W. Johnson’s short notes on “Out My Backdoor” clear up a lot of minor mysteries for me:

https://georgiawildlife.com/out-my-backdoor-bluebird-migration