At birdfeeders and in backyards across North America, the dark-eyed junco, or snowbird, can be found foraging for its next meal. With an estimated population of at least 630 million, juncos inhabit forests, parks, and even suburban habitats, making them one of the continent’s most abundant and easily observable songbirds. But while common and widespread, juncos also exhibit extraordinary diversity in color, shape, size, and behavior across their range, making them ideal study subjects for biologists interested in ecology and evolutionary diversification. Intended for scholars, citizen scientists, and amateur ornithologists, alike, Snowbird synthesizes decades of research from the diverse and talented researchers who study the Junco genus. Though contributors approach their subject from a variety of perspectives, they share a common goal: elucidating the organismal and evolutionary processes by which animals adapt and diversify in response to environmental change. Placing special emphasis on the important role that underlying physiological, hormonal, and behavioral mechanisms play in these processes, Snowbird not only provides a definitive exploration of the junco’s evolutionary history and behavioral and physiological diversity but also underscores the junco’s continued importance as a model organism in a time of rapid global climate change. By merging often disparate biological fields, Snowbird offers biologists across disciplines an integrative framework for further research into adaptation, population divergence, and the formation of new species.

How birds have evolved and adapted to survive winter Birds in Winter is the first book devoted to the ecology and behavior of birds during this most challenging season. Birds remaining in regions with cold weather must cope with much shorter days to find food and shelter even as they need to avoid predators and stay warm through the long nights, while migrants to the tropics must fit into very different ecosystems and communities of resident birds. Roger Pasquier explores how winter affects birds’ lives all through the year, starting in late summer, when some begin caching food to retrieve months later and others form social groups lasting into the next spring. During winter some birds are already pairing up for the following breeding season, so health through the winter contributes to nesting success. Today, rapidly advancing technologies are enabling scientists to track individual birds through their daily and annual movements at home and across oceans and hemispheres, revealing new and unexpected information about their lives and interactions. But, as Birds in Winter shows, much is visible to any interested observer. Pasquier describes the season’s distinct conservation challenges for birds that winter where they have bred and for migrants to distant regions. Finally, global warming is altering the nature of winter itself. Whether birds that have evolved over millennia to survive this season can now adjust to a rapidly changing climate is a problem all people who enjoy watching them must consider. Filled with elegant line drawings by artist and illustrator Margaret La Farge, Birds in Winter describes how winter influences the lives of birds from the poles to the equator.

Urban Ecology: An Introduction seeks to open the reader’s mind and eyes to the way in which nature permeates everyday urban living, and how it has to be understood, cared for, and managed in order to make our towns and cities healthier places to visit and in which to live and work. The authors examine how nature can improve our physical and mental health, the air we breathe and the waters we use, as well as boosting our enjoyment of parks and gardens. Urban Ecology sets out the science that underlies the changing natural scene and the tools used to ensure that cities become both capable of adapting to climate change and more beautiful and resilient. The book begins with a discussion of the nature of urban places and the role of nature in towns and cities. Part 1 looks at the context and content of urban ecology, its relationship to other foci of interest within ecology and other environmental sciences, and the character of city landscapes and ecosystems. In Part 2 the authors set out the physical and chemical components of urban ecosystems and ecological processes, including urban weather and climate, urban geomorphology and soils, urban hydrology and urban biogeochemical cycles. In Part 3 urban habitats, urban flora and fauna, and the effects of, deliberate and inadvertent human action on urban biota are examined. Part 4 contains an exploration of the identification and assessment of ecosystem services in urban areas, emphasising economic evaluation, the importance of urban nature for human health and well-being, and restoration ecology and creative conservation. Finally, in Part 5 the tasks for urban ecologists in optimising and sustaining urban ecosystems, providing for nature in cities, adapting to climate change and in developing the urban future in a more sustainable manner are set out. Within the 16 chapters of the book – in which examples from around the world are drawn upon - the authors explore current practice and future alternatives, set out procedures for ecological assessment and evaluation, suggest student activities and discussion topics, provide recommended reading and an extensive bibliography. The book contains more than 150 tables and over 150 photographs and diagrams.

Report provides information on distribution, abundance, and health of birds, mammals, reptiles and amphibians, fishes, invertebrates, plants, terrestrial ecosystems, aquatic ecosystems, coastal and marine ecosystems, riparian ecosystems, the Great Plains, Interior West, Alaska, and Hawaii. It also discusses special issues: global climate change, human influences, non-native species, and habitat assessments.

Wildlife, species, mammals, reptiles, amphibians, fishes, ecosystems, climate, ecoregions.

Urbanization is rapidly changing landscapes worldwide, driving phenotypic divergence in numerous urban wildlife populations. However, the strength and direction of this divergence may vary across and within cities. Here, we investigated the influence of fine-scale environmental variation on the morphological divergence of dark-eyed juncos (Junco hyemalis) across three Southern California cities. We explored how bill shape varies across three urban populations and one non-urban population, and we tested whether bill shape varies with fine-scale changes in resource availability across urban Los Angeles. Bill shape differed between urban and non-urban populations, but we did not observe expected patterns of bill shape divergence across cities. Bill shape variation also was not associated with fine-scale variation in resource availability within urban Los Angeles. Our findings suggest urban junco bill shape may be driven by non-adaptive processes, other environmental factors, or a more complex suite of urban selection pressures.