> I have a 5 year old African Grey who has started doing somehting a 
 > little unusual for him.
 > He is very vocal ( sings opera) talks a lot and is a very 
 > intelligent bird. He comes out of his cage and sits on top for long 
 > periods and while he is out of his cage (and only then) lifts his 
 > right leg ( and only his right leg) and almost appears to be waving 
You might have your avian vet check his calcium level. As you hopefully know, 
greys require more calcium than other birds. The first signs of a calcium 
deficiency may be the waving, trouble perching and, ultimately, seizures. 
It's a good idea for grey owners to have annual calcium checks on their birds 
anyway.
Ellen
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