Yee-haw

=spoiler=

"Come on, girl," said Artemis, feeling much the cowboy. "Yee-haw!"

When I read this scene, I immediately saw this image very clearly in my mind and I thought 'I must draw this out (.... if I can)'
That horse-like thing is the quagga, and that of course is a eagle, and that blacky thing on Artemis' back is a muskrat, i don't know how that is, so it hide.