Marauder's Map: Selective Against Marauders?

[fienxjox]

No: HPFGUIDX 103925

Pandrea wrote:
> Do we know that the Map can see through an animagi disguise?  I 
> have always thought that in rat form, Peter showed up on the map 
> AS Wormtail, therefore neither Harry nor the twins ever noticed 
> anything funny.  The time that Lupin noticed "Peter" on the Map, 
> he had for some reason - perhaps to get away from Crookshanks - 
> had to temporarily transform back into human form, just for a 
> minute - unluckily for him, the very minute Lupin happened to be 
> looking at the Map.  I'm not sure if this theory really holds, 
> though, is there anything to contradict it?


In PoA (sorry can't give pgs) Lupin says he was studying the map when 
he saw "three people going under the tree" (again sorry no exact 
quotes).  He says there was Ron, Sirius and Peter.  We know that 
Sirius and Peter were in their animal form and only Ron was normal 
shaped.  This would suggest that the map indeed sees through 
animagi.  We have multiple points in the book where it sees animals 
(or at least Mrs Norris) and through polyjuice potion (moody!crouch).

Fx