If you live in or near London, and haven't been to the zoo recently, let me just say this: there are lion cubs. Anyway, have a look at the 'other' section of this sign:
Don't you think that the vaguely feminist 'They've got the right idea, eh girls' implication is ever so slightly undermined by that exclamation mark?
'In lemur society, the females are in charge! If you can imagine such a bizarre thing! And day is night and up is down. Truly, those crazy lemurs live in a topsy-turvy land of misrule...'