|Juvenile Blue Jay|
Only the female incubates; her mate provides all her food while she's on the nest. For the first week after the nestlings hatch, the female broods them and the male still provides food for his mate and the nestlings.
They all abandon the nest around 3 weeks after hatching. Young remain with and are fed by their parents for at least a month, and sometimes two months. There is apparently a lot of individual variation in how quickly young become independent.