To be honest, I didn’t think very hard about the names. The thought process was roughly: 1) I want to make a story whose characters are birds, and I could have a smart black bird. 2) Incidentally, I like that it doesn’t have to be technical or complicated—there are birds you can call “blackbirds,” and there are birds you can call “bluebirds,” so 3) I’ll call my characters “black bird” and “blue bird.” And I liked the colors this suggested, so that didn’t veto the decision. :)
To be honest, I didn’t think very hard about the names. The thought process was roughly: 1) I want to make a story whose characters are birds, and I could have a smart black bird. 2) Incidentally, I like that it doesn’t have to be technical or complicated—there are birds you can call “blackbirds,” and there are birds you can call “bluebirds,” so 3) I’ll call my characters “black bird” and “blue bird.” And I liked the colors this suggested, so that didn’t veto the decision. :)
In any case, I’m glad you liked it, thanks!