I have several bird feeders in my back yard. I cater to all vareties. At any time during the day, there are dozens of birds of all kinds hanging around on the ground, on the feeders, on the fence, in the trees, on the power lines.
Besides the flocks of sparrows and black birds that pass through, there are lots that hang around there all day, finches, cardinals, chickadees, doves, juncos. But at sundown, they all disappear. They aren’t in the trees, on the wires, flying around, on the ground in the field behind the house.
I live next DFW airport, the sky is very bright and the trees don’t have any leaves, it would be easy to see them in the trees if they were there. So, where do they all go?