A baby bird can go without food for a short period of time if it is not yet fully feathered. Once a bird is fully feathered, it can go without food for a longer period of time because it can use its feathers to keep warm. If a baby bird is not yet fully feathered, it will need to be fed more often than a bird that is already fully feathered.
Assuming you are referring to a wild baby bird, the answer is not long. A baby bird will typically die within 24 hours if it has not been fed. The reason for this is that baby birds have very high metabolism and need to eat constantly in order to survive.
In the wild, parental birds will bring food to their young every 10-15 minutes. If a baby bird has not been fed by its parents for an extended period of time, it will likely die from starvation.
Baby bird feeding and raising / How to feed a baby bird
How Long Can a Baby Bird Go Without Food Or Water
Many baby birds hatch without any food in their crops, and they must be fed by their parents soon after hatching. Depending on the species, a baby bird may need to be fed every 15 minutes to every two hours. A hummingbird nestling, for example, needs to be fed every 15 minutes during the day.
If a parent bird is unable or unwilling to feed its young, the babies will starve.A baby bird can only survive a few hours without food or water. If it has not been fed within that time frame, it will likely die.
However, there are some instances where a baby bird may go longer without food or water and still survive. For example, if a baby bird is sick or injured and is not able to eat or drink on its own, it may be able to receive sustenance through an IV drip until it is well enough to eat and drink on its own again.In general though, you should not try to raise a wild baby bird yourself as you will likely do more harm than good.
Instead, contact your local wildlife rehabilitation center so that trained professionals can care for the animal and give it the best chance of survival.

Credit: toughlittlebirds.com
Can a Baby Bird Go All Night Without Eating?
No, a baby bird cannot go all night without eating. Baby birds need to eat every few hours, even at night. If a baby bird is not getting enough food, it will start to sleep more and may eventually die.
How Long Can Baby Birds Live Without Food And Water?
A baby bird can live for two to three days without food and water. However, it is best to provide them with food and water as soon as possible. If you are unable to do so, make sure to keep the area around the nest clean and free of debris.
What Happens If a Baby Bird Doesn’T Eat?
A baby bird that doesn’t eat is at risk for starvation and dehydration. If a baby bird isn’t eating, it’s important to seek professional help from a wildlife rehabilitator or veterinarian. They will be able to assess the situation and provide the necessary care.
How Long Can a Baby Bird Go between Feedings?
Assuming you are referring to a nestling (a young bird that is not yet able to fly), the answer is not long at all. A baby bird will need to be fed every 15-20 minutes for the first week or so of its life. After that, it can be slowly weaned off of constant feedings and will only need to be fed every few hours.
Conclusion
If you find a baby bird that appears to be orphaned, don’t worry! Most birds are not actually orphans, and their parents are usually nearby. The best thing you can do is to leave the bird alone.
The parents will likely return within a few hours to care for their young.If you’re concerned that the baby bird may not survive long without food, don’t worry! Baby birds can go without food for up to 72 hours.
They get all the nutrients they need from their mother’s milk. However, if you find a baby bird that has been away from its nest for more than 72 hours, it’s best to take it to a wildlife rehabilitator who can give it the care it needs.






