A few interesting facts about breeding canaries and other birds, a subject about which I was completely ignorant before reading this. Too bad about the venezualan red siskin that is critically endangered now due to the pet trade and trying to breed it with canaries.
Spoiler Alert:
I don't know, maybe it is supposed to be common knowledge to everyone who would read this book that red canaries exist...but I didn't know it and I was in suspense for the entire book about whether or not they would succeed in creating a red canary. And then it is just sort of glossed over in the last chapter that, oh, yeah, then there were lots of red canaries. I guess I was expecting a more exuberant climax or something.