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With single-digit temperatures in Montana this week, it is still very much book reading season, a time when all birders can—and should—beef up our birding resumés by tapping into the vast wealth of research and experience of the global birding and scientific communities. This past week, I delved into a topic that intrigues most birders by picking up Joan E. Strassmann’s The Social Lives of Birds: Flocks, Communes, and Families (Tarcher, 2025).
A well-regarded professor and scientist, Strassmann has created a comprehensive resource that introduces readers to almost every aspect of bird society. She begins by answering the simple question “Are Birds Social?” (You can probably guess the answer to that!) Then, chapter by chapter, she explores topics that fascinate beginning birders as much as they do veteran scientists. These include flocking behavior, mixed-species flocks, the predilection of many birds to roost and/or nest in colonies, the pros and cons of nesting and/or roosting together, lekking behavior, and more.
I learned something fascinating with each chapter. For instance, I was first drawn to the book because the cover showed a line of six Long-tailed Tits packed tightly together on a branch. I had had the pleasure of observing these birds in the Netherlands (see our post Layover Birding in Amsterdam), Japan (see our post Birding Japan: Kyoto), and Spain (see our post Birding Barcelona, Part 1: The Urban Core), but had no idea that they lived and foraged in stable flocks that are often built around a main breeding pair and its offspring. In her book, Strassmann recounts a study that showed that on chilly nights, the tits nestle tightly together to stay warm, and that often it is the lowest birds on the “tit totem pole” that have to endure the chillier end positions. This is no trivial matter since the birds lose about 9 percent of their total body mass in a single, chilly night.
Similar revelations emerge with every chapter, examining birds from a wide variety of terrestrial and aquatic habitats. My favorite chapter was the last, “Supersocial Groups: Birds That Are Always Together.” That’s probably because it featured one of my favorite birds, the Acorn Woodpecker (see our post College Search Birding in California), and three other species I was fascinated to learn more about: White-winged Choughs, Sociable Weavers, and a bird Braden and I are always delighted to see, Pinyon Jays. Regarding the latter, Braden and I have seen Pinyon Jays only a handful of times here in Montana, and I had wondered why they aren’t more common. Strassmann explains that the birds need extremely large territories to guarantee a dependable food supply. Unfortunately, their main food source, the pinyon pine, has suffered extreme losses from clearing for agriculture and other reasons. Warmer temperatures driven by climate change have also impacted the production of pinyon pine seeds, leading to large-scale die-offs of these beautiful, dynamic, gregarious birds.
The Social Lives of Birds struggles a bit over whether it wants to be a comprehensive resource or an engaging narrative in the vein of the recently reviewed The Great Auk or A World on the Wing. The author mentions her personal connections to many of the topics, but I found these more distracting than engaging. Still, that will not prevent readers from enjoying the book and harvesting a wealth of information—knowledge that will help you look at birds with greater understanding and appreciation each time you head out to bird.
Review copy provided by the publisher.
