In my new found interest to learn more about animals and creatures other than humans, I picked Bird Sense after reading about it on GoodReads.  Bird Sense was an interesting read.  The book lists out some wonderful discoveries about birds and how scientists came to these discoveries.  The discovery of echolocation mechanism in bats was very interesting.  Similarly, the methods used to evaluate the magnetic orientation of birds, which the birds use to navigate during migration, was also very interesting.