Dave has given great advice as always...
I took my 3 birds to my avian vet for check-ups in October of this year. They hadn't been in 2 years.
2 african greys
1 amazon
3 exams, 3 gram tests, 1 band removal, 3 nail trims.......$360.10
I don't take my birds in regularly, But every couple of years, as I want to keep an eye on their gram stain tests, have my vet check them for health, etc. And more than anything, establish a relationship with him in the event of an emergency, he will know me and my birds, and hopefully go out of his way to help me. Plus, my birds get used to him and his staff and office.