Birdie and Blackpaw - Pen Sketch

Just some headshots (busts?) of my current Paws In Pain characters Birdie and Blackpaw. I drew this in Science on my worksheet, when we were watching a documentary that had the answers in it. Don't worry! I got all the answers, I love Science. 
The original drawing is actually blue, but I removed the colour so it appears grey-black. 

Blackpaw is male
Birdie is female
They do not relate in any way and have never met.
If they did, they probably hate each other.

Art, Birdie & Blackpaw: Me
Warriors: Erin Hunter