More birds these days than customers!

This is the biggest mystery this year- what kind of bird is this? Does anyone know? We kind of narrowed it down to some sort of wren. Carolina wren?

Little fella found, somehow, a crack under our greenhouse door big enough to squeak through. He/she then constructed an intricate and sophisticated nest complete with a walkway to the front door, a four inch wide perfectly circular opening four inches in diameter that is 2/3 the size of a basketball complete with a gnarly roof and sturdy sides and floor and a soft comfortable floor and walls.

If feeding is interrupted by a careless human, the babies know magically what to do- SHUT UP AND DUCK DOWN! Be invisible till the beasts go away. How do they know what to do?
​How do the parents know how to build their nests? These birds do a lot more than most species do to make a nest.

If I’m quiet when I go in this room, I can creep a shot of them in between feedings.

...and if I’m sneaky, I can tap on the roof and pretend to be mommy, inspiring this noisy response. Screaming kids “FEED ME FIRST MOMMY!!!” It’s really loud, and I love it!!! Mankind hasn’t eradicated every other species on the planet (yet). Coronavirus is a warning to humanity:

“stop polluting the planet NOW, and we can recover.”