How many babies can bluebirds have?

It depends on the kind of bird. Some that have long lifespans (eagles, penguins, albatrosses, large parrots) have only one or two young at a time and nest only once a year (or less often), while others that have short lifespans usually have many young at a time (quail, turkeys) and/or nest more than once a year (doves, some Songbirds).