budgerigars

It would certainly be illegal. In the UK it's against the law to keep British wild birds in a cage. But caging non-native species like budgerigars and other parrots? That's legal. Goldfinches - Siberian, Himalayan, Gouldian or zebra? That too is sanctioned by law. But the UK's European goldfinch? If you confined one of those you could be prosecuted.
That is all. And yet... that's all it needs to be. Well, we say that. But much as we love this funny little video, we do