If you do not want to use your email address to register for WhatSpecies, you can register using your existing Facebook account.
IMPORTANT: If you register using Facebook, you will not be able to choose your own username. Your Facebook First name and Last name (Display name) will be used as username.
On the registration page, click the "Register with Facebook" button.
The following window will open up:
Log in to your Facebook account like you normally would.
WhatSpecies will automatically log you in using your Facebook login credentials.