Much flapping. Parents arriving.
Feeding time. Pigeons feed their babies mouth-to-mouth, regurgitated food. In this case it was no longer liquid gruel. This kid was getting clumps of soft food. How would you like your kid's head down your throat?
This is the father feeding, alternated with the mother.
A blop of the food fell on the stoop landing. The baby saw it, but did nothing. It doesn't know how to peck at food yet. It had been on the stoop wall, flew to the landing, down, but it had difficulty getting back up onto the wall. It bobbled that return uplift. Good on down-flight,inept on up-flight.