Remus's Patronus took the form of a large grey wolf. But he used to disguise the form by creating non-corporeal Patronuses since he thought that a wolf Patronus could give away his state of being a werewolf.
Out of the Marauders, he was the first one to create a fully formed corporeal Patronus.
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101 THINGS ABOUT REMUS LUPIN
FanfictionThe title pretty much says it all. This book contains about a hundred facts on Remus John Lupin's life, personality and character. We all have a fair idea on who he was, what he did and how he died but don't we all want to know a lot more about him...