How old are baby greenfinches when they start to eat?

Baby greenfinches typically begin to eat solid food at around 2 weeks of age, although they may still rely on their parents for feeding at this stage. By about 3 to 4 weeks old, they become more independent and can eat a variety of seeds and other food sources. Their transition to self-feeding coincides with their fledging, which usually occurs around 3 to 4 weeks after hatching.