Some birds change color from child to when they become an adult. The Spreeuw who visits the garden about one or more times a week is a good example. Luckily we managed to capture several photos of him throughout 2020 and one child in 2021. All are the same bird except the child 2021.
I didn’t know anything about a Spreeuw but from my observations I find him very mysterious and mystical. He walks like a penguin, poops like a pigeon, does not bother any other bird in the garden and waits his turn at the apple feeder. The other birds in the garden treat him like he is invisible.