Here is a moulting Yellow-eyed penguin couple at about the same stage of the moult. They raised their chicks, then fattened up, then spend 4 weeks ashore with each other moulting. This is an important part of the pair bond maintenance and those pairs that managed to coordinate this are much less likely to divorce than those that either don't overlap or can't find each other during the moult. So, who moults together, stays together! With such a bad-hair-month it's got to last!