If you’ve read much about animal intelligence, most of the stuff in this book won’t be all that surprising, though of course since it’s entirely about birds, it includes a lot more anecdotes and bird-focused studies. As a whole, the book definitely makes a case for birds as specialised, well adapted, and very intelligent in their own spheres. We won’t be having philosophical discussions with them any time soon, though, if that’s what you thought ‘genius’ meant. And I think honestly that Ackerman makes less of a case for bower birds’ displays being art than others I’ve read.
It’s an easy read, and good for some ‘huh, cool’ moments, but not the most rigorous or unmissable popular science book out there.