As I explained in a prevois pic, when the anthros W.I.T.C.H transfor they become a little more human.
Tails and original wings disapear. (they get their eitch wings)
Legs become more human like and stuff.
So don't go all 'you forgot youre tail!'
I didnt. :-P .

This pic will be in the W.I.T.C.H comic that I will presume someday.
It's based on this part of Petra's story for the anthros W.I.T.C.H :

Cornelia felt the pain of the earth when the creatures soiled the ground. Their poison was strong and even dangerous.
Will was the first who reacted. ‘Irma! Use your power and wash that stuff away! It’s hurting Cornelia!’ Irma thought that Will was joking. ‘Ow come on, what could ever hurt Pretty bo…’ But when he saw Cornelia fell down to the ground, and the other trying to catch him, he knew this was serious.
‘Thirsty guys? ‘ Like a canon water came out of Irma’s hands. But neither the creatures neither the poison seemed harmed by his power. ‘Will! It doesn’t work! These bastards are made out of the element earth, we need Cornelia!’ “Irma can’t you see that Cornelia is not in the position to..’ ‘I’m..I’m fine.’
Cornelia stood up, breathing deep and fast. ‘Step back guys, I’m gonna show these monsters what the true power of earth is!’ Cornelia closed his eyes and concentrate his thoughts on the ground beneath the creatures. ‘You!’ (the earth trembled.) ‘shouldn’t!’ cracks where appearing and growing bigger, in which some of the creatures felt down.’ ‘Piss Off!’ Vines as thick as tree’s came out, crabbing the creatures. Squishing them. Or just went thru their chest and hearts.) ‘Brother!’ (Cornelia was glowing a green light, and cracks appeared in the creatures body’s.) ‘Nature!’ (the creatures became dust.)
When the creatures where gone, the earth recovered itself. It was like nothing had happened at all.
The other W.I.T.C.H members stood there with an amazed look on their face.
And the only thing Irma could say was. ‘Remind me that I never piss him off again. At least not as much as I used to!’