Birdsong ID Puzzler

Patty was working in the yard a couple of weekends ago and she kept hearing a birdsong she couldn't quite identify. She said she couldn't tell if it was a Chipping Sparrow or a Pine Warbler (the names link to the songs for each bird). She was rather puzzled.

I was working from home the following Monday and saw this:

The image above is a Chipping Sparrow and the one below is a Pine Warbler.

Puzzle solved. 🙂