I’m unsure about this. “Catbird” isn’t a well-defined tag. While the tag is definitely made for griffons, I don’t know what else it’s supposed to show. Is it a tag for cute griffons, griffons behaving like cats, something else, or just a tag for griffons? If the latter, it should probably be aliased to “griffon”. For now though, I added the implication.
Also, I set the last two tags you mentioned to imply
behaving like a cat and
behaving like a bird, respectively. Until there’s more clarity on “catbird” though, I won’t set those tags to imply it.