“This book is a gem, witty, entertaining, insightful, and deeply informative—a must-read for anyone interested in birds or brains.” JENNIFER ACKERMAN, New York Times bestselling author of The Genius of Birds , What an Owl Knows , and The Bird Way “A vivid book on avian intelligence.”— Booklist , STARRED Review Discover the secret intelligence of birds, revealed by one of the world’s leading researchers in avian innovation. Surveying a wide variety of birds, including crows, finches, tits, and parrots, Louis Lefebvre, a world-renowned expert in animal behavior, describes the remarkable innovations and problem-solving abilities of species often dismissed as “featherbrains.” From crows using cars as nutcrackers to cockatoos crafting tools, Lefebvre reveals how birds exhibit creativity, social learning, and even cultural transmission—traits once thought to be exclusive to humans and other primates. Blending his decades of scientific research with engaging anecdotes, Lefebvre examines the evolutionary forces that have shaped avian intelligence. He explores how birds adapt to urban environments, innovate in response to challenges, and pass down knowledge across generations. This goldmine of bird behavior yields an “innovation quotient” (like our human IQ) widely used by researchers to measure and rank how innovative a bird species is. Using his encyclopedic knowledge, Lefebvre answers questions such as: When a bird species learns a new technique, how do their innovations spread? - Why is research on bird cognition being used to train AI models and even robots? - What makes certain birds endlessly innovative while others stubbornly repeat the same behaviors? With vivid storytelling and groundbreaking insights, A Bird’s IQ invites readers to reconsider their perceptions, celebrating the ingenuity of birds and highlighting the interconnectedness of all intelligent life. "[A Bird's IQ] shares the tricks, inventions, and astonishing feats of birds around the world as it examines their intelligence. ... Bird lovers will find a lot to digest, while readers who are interested in animal intelligence will enjoy this new perspective on the topic." —Library Journal “Animal behaviorist Lefebvre pens a vivid book on avian intelligence…this lively look at the myriad ways birds have found to exploit their environment and find their food is full of fascinating science and engaging anecdotes.” —Booklist , STARRED review “Packed with enlightening case studies of avian ingenuity, this will make readers rethink the meaning of birdbrained.” —Publishers Weekly “With equal measures of joyful curiosity and scientific precision, A Bird’s IQ maps the capacity of birds for discovery, innovation and learning. You will never look at those featherheads in quite the same way again.” —Candace Savage, author of Bird Brains “ A Bird’s IQ is an amazing avian adventure. It provides the reader with gorgeous glimpses into the mysteries and magic of bird brains and behavior, and in a way that integrates the author’s passion and academic knowledge of the field, both scientifically and artistically. Like a profound magic effect, there are hidden gems on every page, tailored to both the general public and the in-depth expert. A page turner!” —Nicky Clayton, Fellow of the Royal Society and Professor of Comparative Cognition, University of Cambridge "Lefebvre has a talent for distilling complicated research into digestible prose, even when discussing complex topics, such as how the level of NMDA 2B receptor expression relates to a species’ rate of innovation, making this book suitable for both casual birders and scientists alike.... A complete and informative book on bird intelligence." — Kirkus Reviews “This book is a gem, witty, entertaining, insightful, and deeply informative—a must-read for anyone interested in birds or brains. I learned something new on every page and came away with a more profound understanding of birds and wonder at their astonishing mental complexity and capacities.” —Jennifer Ackerman, New York Times bestselling author of The Genius of Birds , What an Owl Knows , and The Bird Way Louis Lefebvre is professor emeritus of biology at McGill University and associate researcher at the Autonomous University of Barcelona. He was awarded the Geoffroy-Saint-Hilaire prize by the French Society for the Study of Animal Behavior. Lefebvre is the author of four novels written in French, two of which were finalists for the Governor General’s Awards. He lives in Montreal, Québec.