Why is my healthy budgie losing feathers when flying or flapping?

If Bobo is otherwise happy and healthy, he could just be molting. This is a normal thing that happens when your bird sheds their old feathers and replaces them with new ones. You will likely see "pin" feathers, or feathers that look like little pins sticking out of the skin in the places where old feathers were lost if this is the case. If, however, Bobo is itching, there is redness, new feathers aren't growing in, or he seems ill or upset, it could indicate something else such as parasites, skin issues, etc, that should be checked out by a vet.

Feather loss can be from any number of things, so finding the underlying cause is best. Molting is a normal loss of feathers that occurs 1-2 times a year and all the old feathers are replaced with new ones. You will see "pin" feathers appearing on the skin (look like needles or pins) to indicate this is a molt and new feathers are growing in. Making sure Mithu is on a balanced diet can help ensure he grows in new feathers. Skin issues such as parasites, infections, nutritional issues, etc can also cause feathers to fall out. Treating any visible wounds, making sure Mithu is on a balanced diet, and using a mite spray to treat any external parasites can help. Illness can sometimes cause feathers to fall out either due to a lack of nutrition or from the illness itself. If you can't find an immediate problem, having a vet examine Mithu is best to rule out any illness. Boredom and stress can also cause feather plucking, which may make it look like the feathers are falling out. Making sure your bird is kept in a quiet, stress-free area away from noisy pets and people, and providing lots of enrichment such as toys to play with and chew on, fun treats, and time spend together can help. In some cases, an Elizabethan (e-collar) may be needed to break the behavior if it has become a habit.

It is possible Penny is molting. This is normal and is the process of losing old feathers while new ones grow in. You may see pin feathers, or small feathers that look like little pins sticking out of the skin as they grow. It often looks like a mess because some birds tend to lose a lot of feathers all at once, while others have a slower, gradual molt. As long as she is otherwise healthy and active, making sure she is on a balanced diet to ensure good feather growth is best. If she seems ill or new feathers are not growing in, it could indicate she is ill, has some mites, or another skin condition which should be checked out by a vet.

If your bird is otherwise acting normally and healthy, it is possible it may be a molt, especially if you are seeing feathers coming back in already. Other possible causes to look for are plucking, as you suggested, as well as parasites such as mites/lice. Making sure your bird is in an area that is low stress (aka, he has a chance to relax quietly when he needs to) can help as well as looking for/treating any possible mites. If the bald patch increases, the feathers don't regrow, or you see other issues, then having a vet take a look is best.

The most common reason for feather loss is feather picking. This is usually a behavioral trait that can be very hard to stop. I would recommend a visit to a vet to just make sure there are no underlying disease like parasites or infectious. IF the medical exam is normal make sure to have adequate space for Harry to live. Provide plenty of toys to play with and possibly a mirror. Increase interaction in a quiet place of the house to reduce stress. You can mist the features with an over the counter feather hydrating spray. Sometimes if it is not improving their are medications you can use to help with this behavior.

Thanks for adding in a photo! From the photo, it looks like Meenu might be molting! This is normal in all birds, and happens when they replace their old feathers with new ones. Baby birds will also have a molt as they reach adulthood, losing their soft downy feathers (the wispy ones in the picture) and replacing them with their adult feathers. It is very normal for colors to change somewhat during a molt as brighter colors come in, and the feathers may fade some with time as well. As long as Meenu is otherwise healthy and happy, it isn't anything to be worried about. To see if your bird is growing in new feathers you can look for pin feathers (small like needle-like things poking out of the skin). Making sure Meenu is on a healthy balanced diet can help make sure she has a good molt and grows in healthy new feathers.

Thanks for reaching out about flint and including a photo. The picture of the feather appears normal. Heavy molts can be normal but also the caused by stress, poor nutrition, some viral diseases, external parasites (mites, lice), metabolic problems (liver, kidney) and others possibilities. A veterinary visit is recommended if concerned to help assess the problem and provide a diagnostic/treatment plan. Good luck.