If you suspect a fractured wing or leg, immediately transfer your bird to a hospital tank and call your vet. A hospital tank is better than a cage if you have one because your bird could climb about inside the cage, further damaging the broken bone.
If there is any bleeding, apply some cornstarch, baking soda, styptic powder or flour to the wound and apply some pressure using a gauze swab until the bleeding stops. If you are unable to get the bleeding to stop, continue applying pressure and rush straight to the vet. If you are able to stop the bleeding, you can attempt the following supportive techniques.
If you suspect a broken leg, you could attempt to make a splint to support it depending on how bad the fracture looks. For a larger bird, secure it in a towel, and clean the area with some anti-bacterial soap. You could use 2 matchsticks (obviously with the heads chopped off!), or even small chop sticks or small garden plant canes cut to size. Place one at either side of the leg, parallel to it, and secure them to the leg with a bandage and some tape. This will provide a little extra support until your bird gets to the vet. For a smaller bird, you could simply use some Elastoplasts to secure the break by sticking two plasters together around his leg. If you have some tissue glue to hand, you could apply this to the plasters to harden them for further support.
You still should have a vet look at it. The process posted above is something that takes some calm and steady hands to handle. If your mom will help you by getting the stuff to fix the leg and help yo do it, your bird might be all right, but this really is something a vet should be checking.
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