Tag alias: parakeet <-> budgerigar

The tag budgerigar is currently being used for an artist. The artist should be moved to kitsan or budgerigar_(artist), so that parakeet can be aliased to budgerigar (or vice versa).

http://en.wikipedia.org/wiki/Parakeet
http://en.wikipedia.org/wiki/Budgerigar

Seems like there's differences. An implication would probably be better.

If it's a hyperspecific subset of parakeet leave them alone, we don't really need to be subdividing animals that far.

There's two different senses of the word parakeet. There's the technical sense that Wikipedia describes, but that's not the one most people are familiar with and it's not how the tag is already being used. In the more common usage, parakeet is just the American word for budgerigar.