I'm going to be putting together a Kickstarter for a novel I wrote a while back, and I've been doing some art for the presentation. One of the critters in the story are giant condors called thunderbirds. Although there's not anything in this pictures to show scale, an adult is about the size of a Cessna. Generally they're peaceful, but every once in a while some go rogue and need to be dealt with. The one of the bottom right doesn't have a crest because it's not an adult.

Watercolor and pencil, with some ink.