These are supplies you should have available for use in the event you need to treat an injured bird. The Merck Vet Manual website details a nicely stocked first-aid kit. Some of the items are:
Phone numbers – Critically important to have your avian vet’s number handy.
Flour – To control toenail bleeding, put some flour in the bottom of a shoe box and let the bird walk around.
File – for attending to very pointy nails.
Hemostat or forceps – Assist in removing tangled material from birds legs.
Cotton swabs and gauze
Carrier to transport your bird.