By some estimates, we may already have lost almost half of the songbirds that filled the skies only forty years ago. Renowned biologist Bridget Stutchbury convincingly argues that songbirds truly are the "canaries in the coal mine"--except the coal mine looks a lot like Earth and we are the hapless excavators.Following the birds on their six-thousand-mile migratory journey, Stutchbury leads us on an ecological field trip to explore firsthand the major threats to songbirds: pesticides, still a major concern decades after Rachel Carson first raised the alarm; the destruction of vital habitat, from the boreal forests of Canada to the diminishing continuous forests of the United States to the grasslands of Argentina; coffee plantations, which push birds out of their forest refuges so we can have our morning fix; the bright lights and structures in our cities, which prove a minefield for migrating birds; and global warming. We could well wake up in the near future and hear no songbirds singing. But we won't just be missing their cheery calls, we'll be missing a vital part of our ecosystem. Without songbirds, our forests would face uncontrolled insect infestations, and our trees, flowers, and gardens would lose a crucial element in their reproductive cycle. As Stutchbury shows, saving songbirds means protecting our ecosystem and ultimately ourselves.Some of the threats to songbirds: - The U.S. annually uses 4-5 million pounds of active ingredient acephate, an insecticide that, even in small quantities, throws off the navigation systems of White-throated sparrows and other songbirds, making them unable to tell north from south. - The U.S. Fish and Wildlife Service conservatively estimated that 4-5 million birds are killed by crashing into communication towers each year.- A Michigan study found that 600 domestic cats killed more than 6,000 birds during a typical 10-week breeding season. Wood thrush, Kentucky warbler, the Eastern kingbird--migratory songbirds are disappearing at a frightening rate. By some estimates, we may already have lost almost half of the songbirds that filled the skies only forty years ago. Renowned biologist Bridget Stutchbury convincingly argues that songbirds truly are the "canaries in the coal mine"--except the coal mine looks a lot like Earth and we are the hapless excavators.Following the birds on their six-thousand-mile migratory journey, Stutchbury leads us on an ecological field trip to explore firsthand the major threats to songbirds: pesticides, still a major concern decades after Rachel Carson first raised the alarm; the destruction of vital habitat, from the boreal forests of Canada to the diminishing continuous forests of the United States to the grasslands of Argentina; coffee plantations, which push birds out of their forest refuges so we can have our morning fix; the bright lights and structures in our cities, which prove a minefield for migrating birds; and global warming. We could well wake up in the near future and hear no songbirds singing. But we won't just be missing their cheery calls, we'll be missing a vital part of our ecosystem. Without songbirds, our forests would face uncontrolled insect infestations, and our trees, flowers, and gardens would lose a crucial element in their reproductive cycle. As Stutchbury shows, saving songbirds means protecting our ecosystem and ultimately ourselves.Some of the threats to songbirds: - The U.S. annually uses 4-5 million pounds of active ingredient acephate, an insecticide that, even in small quantities, throws off the navigation systems of White-throated sparrows and other songbirds, making them unable to tell north from south. - The U.S. Fish and Wildlife Service conservatively estimated that 4-5 million birds are killed by crashing into communication towers each year.- A Michigan study found that 600 domestic cats killed more than 6,000 birds during a typical 10-week breeding season.

    With the latest findings about the mental and physical benefits of exercise, personal stories from scientists and laypeople alike, as well as researched-based prescriptions for readers, Gretchen Reynolds shows what kind of exercise—and how much—is necessary to stay healthy, get fit, and attain a smaller jeans size. Inspired by Reynolds's wildly popular “Phys Ed” column for The New York Times, this book explains how exercise affects the body in distinct ways and provides the tools readers need to achieve their fitness goals, whether that's a faster 5K or staying trim.

    Two ganders who work together as a mated pair? Two female bears raising their four cubs together? A kangaroo with both a female pouch and male sex organs? Who's been keeping all this a secret? Homosexual mating and pairing occur in all species, so contends author Bruce Bagemihl in this well-researched book on animal homosexualities. Bagemihl is a biologist and researcher who went from teaching to working at Microsoft, and now he's produced one phenomenal book on gay, lesbian, bisexual, and tr ansgendered animal life. Bagemihl first shows how past biologists and anthropologists have made their errors in reportage regarding observations in the field of homosexual behavior among the beasts (interestingly enough, all homosexual behavior tended to be called either aggressive or passive, and not about mating or affection between animals, even though it was often the identical mating behavior as the heterosexually-oriented animals). In this often lively, but sometimes overwhelmingly encyclopedic study and listing of homosexual diversity in the animal kingdom, the author has done a phenomenal job of bringing science into a popular idiom so that the animal behavior he details i s understandable to the layperson.Biological Exuberance is divided into two main sections, "A Polysexual, Polygendered World" and "A Wondrous Bestiary: Portraits of Homosexual, Bisexual, and Transgendered Wildlife." The first section primarily deals with how we as a civilization have viewed animal sexuality in the past, and themyths we'vebuilt up around it, and the author's term, "biological exuberance." Here's how Bagemihl himself describes it. The essence ofBiological Exuberanceis that natural systems are driven as much by abundance and excess as they are by limitation and practicality. Seen in this light, homosexuality and nonreproductive heterosexuality are "expected" o ccurrences — they are one manifestation of an overall "extravagance" of biological systems that has many other expressions. In the second major section of the book, the author breaks his studies down into individual animal species and subgroupings of species. Fascinating, page-turning in its own way, and full of pictures of homosexual matings and sexual congress among our furry and feathered friends,Biolobical Exuberance is one of the most readable scientifically-based books of the year. Get this one. It is amazing.