Author Archives: Nathan Lyle

In FY2021, Wildlife Services (WS) received $1.38M from Congress for the second year in a row to expand the use of nonlethal methods to protect livestock from large carnivore depredation and to research efficacy and development of new nonlethal approaches. … read more

Saint Paul-based National Parks of Lake Superior Foundation (the Foundation) has released a new documentary film, “Return of the Wolves: Lessons from the Wilderness,” and corresponding educational lesson plans for classrooms, distance learners, and homeschooled students. To learn more about … read more

Top predators are endangered throughout the world because of human persecution and habitat destruction. Plans to conserve and restore predator populations are often contentious, but few species are as problematic as the gray wolf (Canis lupus). In the United States, … read more

Beginning in the mid-nineteenth century, Euro-American settlers began the task of changing the landscape of California from vast expanses of wetland and forest into agricultural land. Since the arrival and eventual settlement of Spanish colonizers, ranching cattle has been a … read more

A relationship between winter weather and survival of northern ungulates has long been established, yet the possible roles of biological (e.g., nutritional status) and environmental (e.g., weather) conditions make it important to determine which potential limiting factors are most influential. … read more

Chronic wasting disease (CWD) is a transmissible prion disease first observed in the 1960s in North America. This invariably fatal disease affects multiple cervid species in the wild and in captivity. In addition to the several known transmission pathways involving … read more