The Thick Billed Parrot finally has a recovery plan in progress - was listed on the US Endangered Species List in 1973! Please see these articles;
No protection for USA's last native mainland parrot Conservation News - No Recovery Plan for the Endangered Thick Billed Parrot | That Bird Blog
Thick Billed Natural History, Zoo Care The USA
Recovery Plan: Register your comments Society for Conservation Biology | SCB Recommends Steps to Restore Thick-billed Parrot to its Historic Range in the United States
Enjoy, Frank
No protection for USA's last native mainland parrot Conservation News - No Recovery Plan for the Endangered Thick Billed Parrot | That Bird Blog
Thick Billed Natural History, Zoo Care The USA
Recovery Plan: Register your comments Society for Conservation Biology | SCB Recommends Steps to Restore Thick-billed Parrot to its Historic Range in the United States
Enjoy, Frank