How does one go about adopting these birds?
Mark is an Avian Vet that dedicated an Avian store/Rescue which he owns and operates with a staff that has been there a very long time and cares for the birds.
Since he is an Avian Vet, All birds are thoroughly checked before he releases them to be sold. Some he adopts himself, or takes home and observes and socializes them as do the staff. These birds are treated with upmost care.
Rescue birds are held for a while then worked with by Mark, and staff to assure any abuse or bad habits are broken. They take these birds home and socialize them and observe them.
Prices are reasonable, but may be a bit higher than one would pay for a bird that hasn't been checked out, or socialized. Prices are negotiable as well.
Mark accepts payments on birds as well instead of full price. His choice however.
The Birds that are not rescues are obtained by well known breeders and show birds from bird shows at cobal arena in Detroit or Birch Run Expo center up by me. The birds are always top notch quality form there, those that do not meet criteria are not bought by mark, so you know your getting a very good quality bird, with good disposition. Poppie, My Amazon came from there originally to owner before me. She is one Amazing Amazon, I've yet to come across one that has the disposition she has and the very large vocabulary as well.
The Store and rescue is "Wings and Things" in Bay City, Michigan
Their web site may not be up to date as Mark and their staff spend their time with birds and bird shows, and have little time to keep web page updated.
I with you were closer to IL! 
