[Cederfjard]

Irrelevant nitpick: I believe the saying you’re after is ”going the way of the dodo”, referring to the fact that dodo birds are extinct. Cuckoos are still extant.

Although you can also ”go cuckoo”, as in crazy.

[norswap]

Haha you're right, thanks! Something was rubbing me the wrong way as I wrote it but I couldn't figure it out.