Both of these novels are set in the U.S., and have to do with birds and birders. But other than that, they're pretty much as different as they can be.
The Boreal Owl Murder, by Jan Dunlap, is a mystery novel. The protagonist is a birder looking for a Boreal Owl, but instead stumbles onto a dead body. It may sound serious, but this is actually a fun and amusing story. It's not perfect, but a birder looking for a light read could do much worse.
Review of The Boreal Owl Murder
In Hovering Flight, by Joyce Hinnefeld, is a character drama about an ornithology professor, his artist wife, and their daughter. It's definitely a change of pace from what I normally read, but I'm glad I gave it a chance. The writing is great, and the story, although fairly slow at times, grows on you.
Review of In Hovering Flight