I think these two might be done! Here is C for Cow and D for Dolphin.
I'm reconsidering the hand lettering of the words, though. I'm either going to go with one consistent hand drawn font or pick a nice font to type in. I think I like the lettering from Elephant.
Here is the color layout I did next to my color palate. It helps to get a perspective on how the colors are going to lay out on the series as a whole. It's the equivalent of stepping back from a painting when you've had your nose in it all day long. I'm still reconsidering F. I think I'm going with Fireflies... or Fox... or Flamingo. It's so hard to choose! Thanks for those who gave great suggestions.
You can see I've left V and F uncolored. I'm not convinced I like vulture. I'm not sure it would be that fun to draw, or fun to hang on a wall. Do you guys have suggestions for V?