***** Another captivatingly told chapter of life’s evolutionary history
After writing two bestsellers on the evolution of dinosaurs and mammals, palaeontologist Steve Brusatte here provides the missing piece of the puzzle by turning to the evolution of birds. You might even ask why this book was not immediately written after The Rise and Fall of the Dinosaurs. How so? If this book has one take-home message, it is that birds are, quite literally, dinosaurs. The Story of Birds sees Brusatte, by now comfortable in his science communication skills, combining captivating episodes of evolution with accessible explanations, while giving plenty of attention to the people behind the findings.
Until I started this book, I had a large gap in my understanding of bird evolution. Sure, I was familiar with the ongoing discussion as to which group of theropod dinosaurs was the ancestor of birds. I had admired first-hand the famous Berlin specimen of Archaeopteryx, a genus that has become, through sheer history, “a conceptual anchor point for discussing bird origins” (p. 91). And I knew that this was followed by something-something-evolution and, oh look, now we have more than ten thousand bird species. But what happened in between?
To tell the story of birds, Brusatte takes a two-pronged approach. The first few chapters discuss how certain dinosaurs evolved the anatomical, physiological, and behavioural features that we all associate with birds: feathers, wings, beaks, endothermy, flight, song, etc. The remainder of the book then examines how birds evolved and diversified to become the creatures we recognise today. This involves a cast of increasingly bird-like creatures, some of which are on the direct line to modern birds, others of which are sister groups that left no descendants. It also involves all sorts of delightful evolutionary experiments, notably the repeated loss of flight leading to all sorts of giant land birds.
I was impressed with how Brusatte casually introduces important concepts in ecology and evolutionary biology. Take exaptation; or, how evolutionary innovations, such as feathers, often come about by repurposing existing structures. Or take the ecological niche: how modern birds diversified extremely rapidly after the extinction of the (non-avian) dinosaurs into now-vacant positions in ecosystems, and since then have been tinkering around the edges. Another concept is biogeography, and how it has been shaped by plate tectonics. The “tectonic handshake” (p. 285) between North and South America when the Panama Isthmus formed some 2.7 million years (Ma) ago led to the extinction of terror birds, while the island corridor forming close to Australia some 27 Ma ago blessed the world with bird song as passerines started migrating around the globe. And then there is the incredible story of ratites and how DNA research completely overturned long-held ideas about their evolution. I will leave that one for readers to explore.


What keeps these forays into biological concepts accessible to a wider readership are Brusatte’s sometimes amusing analogies. He clarifies that saying that birds are dinosaurs is not some sort of “rhetorical sleight of hand—academic scientists harping on a technicality” (p. 7). Species classification is about ancestry: “Family trees are like a set of nested Russian dolls—groups within groups” (p. 33). The fact that birds look so different is irrelevant: “Scientific classification follows the same rules as the mafia: If you’re born into the family, you can’t get out” (p. 33). When explaining how many bird traits did not evolve for the purpose of flight, another nice analogy follows: “The Wright brothers, after all, did not invent the wheel or the propeller. But they put them together and got them working in a new way—as an airplane” (p. 38).
Brusatte has lost none of his humility, something already on display in his previous two books. Thus, he is not shy to admit where his work stands on the shoulders of giants and explicitly acknowledges where he has collaborated with specialists on subjects he is not an expert on, such as flight and biomechanics. More broadly, there is a sense of professional humility. There are competing scenarios for how bird flight began. The problem is that we only have Archaeopteryx to draw on. “I have learned to be comfortable with the uncertainty: We can’t be totally sure how the bird flight stroke began” (p. 101). Similarly, current consensus favours the idea that modern birds evolved from waterbirds, with Vegavis and Asteriornis key fossils, but Brusatte is quick to add that “again we must be humble in the face of the fossil record. These are simply two species, the only ones currently known from decent skeletons” (p. 135). Another aspect of his writing that makes a return here, closely allied to this attitude of humility, is his respectful portrayal of other people. He goes beyond the journalistic trope of describing their appearance and dress, exploring what motivates and interests them. It helps that, as a scientist, he understands their work intimately. Additionally, he will read up on biographical sketches of past figures. And even where he disagrees with others, he will recognise their other achievements.


Two final features of the book I want to call out are the reference section and the illustrations. As in the previous two books, rather than a simple reference list, you get a chatty 53-page literature review in which Brusatte expands on his thinking processes, gives reading recommendations, and adds further detail. This is something few other authors do, and I continue to enjoy it. No fewer than four illustrators are credited. As before, the dust jacket has been drawn by Andrew Davidson, so this trilogy looks great on your bookshelves. I am not sure that Todd Marshall has actually contributed anything to the UK version. In an Instagram post, Brusatte mentioned having to call on Cordula Mark Venters at the last minute, who provides equally lovely chapter openings and species montages. The useful infographics are again by Sarah Shelley. Finally, Daniel Field is credited with several galleries of bird photos. Overall, the black-and-white reproduction of all photos in this book is middling, and given that it is already topping bestseller lists, some colour plates would not have been out of place.
The praise and accolades that this book rapidly gathered towards its release have been well-deserved. If you read his previous books, picking this one up is a no-brainer; if you have not, you are missing out! Brusatte has written another phenomenally interesting work of popular science. Confidently told while always deferring to the provisional nature of palaeontological knowledge, and with plenty of attention to the people behind the research, this is scientific storytelling at its best.





















***** Still as captivating and entertaining as in 1988



***** A remarkably diverse collection of the very best of current palaeoart













