According to this link Latios is a bird. (or well, it is from what we know) It has wings, feathers, beak (kinda sorta), advanced communication and feet. (I think they pull out but I know from the movie that it can transform into humans, lol)
[01:47:47] <+Limi> gamefreak has confirmed the rumour
[01:47:53] <+Limi> that mewtwo now has a tumor
[01:47:59] <+Limi> but please man, chill out
[01:48:03] <+Limi> you don't need to pout
[01:48:08] <+Limi> just take it all in good humour!
Originally Posted by Fat trickroom
Blizzard is for the whole Dragon Slayer thing, it OHKOes almost any Dragon in the tier save Kyurem, Giratina, Dialga, Palkia, Reshiram, Zekrom, Latios, Latias and Giratina-O.