When we built the addition, I had the construction people cut the evergreen straight down the trunk, top to bottom. From the outside, the tree looked intact. From the house, the branches were completely visible. So the parents would drop off the babies at Evergreen Playschool while they went out foraging, their offspring safe from the hawk I once saw in the yard.
Baby Birds - Etude - Chopin - 1993
https://youtu.be/5pVqvCsrZaY
Birds are smart enough to tell a good human from a bad one.
I once crossed a field that must have had a hawk’s nest, because he kept bomb diving me.