I don't know why it won't work for you, goes there fine foe me.. I will try some other way to link it.

The growth seems to be limited to its back, from what I read Avian Pox growths are limited to skin areas

''In many cases only local lesions''

''Avipoxvirus is unable to penetrate healthy skin. Transmission through biting arthropods or through contact
between contaminated material or latent infected birds and wounds.''

''Transmission mainly occurs when viral particles enter the body through an opening in the skin.''

''Cutaneous (dry pox): this form is characterized by a local epithelial hyperplasia involving the epidermis and feather follicles. The nodules begin as small white foci, which rapidly increase in size and turn yellow.''

''Avian pox can also be transmitted by direct contact between infected and susceptible birds. The virus is transmitted through abraded or broken skin...''