Curious Artifacts

In my post about the recent Red-shouldered Hawk visit I noted the "curious artifacts" caused by shooting through the windows at our house. But in the hawk image the artifacts were somewhat subtle.

Hermit Thrush

Here as some images of recent yard birds taken from inside the house, through the dining room window.

American Goldfinch

The artifacts are much more obvious, especially in the first image above, over and behind the bird's neck.

It's nice to see the birds eating the seeds and berries and using the little frog pond for water.

Dark-eyed Junco

I'm guessing that as there are double pane windows what we're seeing are internal reflections. But that's just a guess.

I suppose I'll have to do some experiments.