Success!
After running for 4 days (LOL) and detecting the sun as "oven" and moving leaves on a bonsai tree as "airplane" and "keyboard", a small bird flew in and perched itself right on the balcony rail, and my MuppetBot detected "bird".... LOL
My wife was watching the coronavirus updates on the local news and excitedly yelled "A bird is in your camera view! Did you get it!"... hahah. I checked, and sure enough, "bird". LOL
Little MuppetBot is certainly far from perfect (I need to install a more robust (large, slower) TF object detection model, but have been busy on the test migration project....).
Check it out