Why don't we ever see Baby Pigeons?

Answer:

By the time a baby pigeon is ready to leave its mother (around 4 weeks), it is already fully feathered, and simply looks like a slightly smaller version of a mature pigeon. At this age, it is already too big to fit comfortably in the palm of an adult's hand. You probably do see baby pigeons, but they are not easily distinguishable as being younger than other pigeons.