In prehistoric times, the Santa Cruz River in what is now southern Arizona saw many ebbs,
flows, and floods. It flowed on the surface, meandered across the floodplain, and …

Climate and landcover change can have synergistic impacts on wildlife populations, but the
pervasiveness of these threats and factors that buffer them remain unclear despite important …

Strategies to conserve rare species require identifying resources that function as important
habitat elements and that promote high demographic performance. Assessing the relative …

Methods As part of a statewide survey to document distribution, abundance, and habitat of
pygmy owls in Sonora, we surveyed 71 transects clustered around 23 randomly selected …

Monitoring the vocal behavior of owls is challenging because of their nocturnal habits and
limited vocal activity. Here, we evaluated the use of passive acoustic monitoring coupled …

Spatial variation in resources is a fundamental driver of habitat quality but the realized value
of resources at any point in space may depend on the effects of conspecifics and stochastic …

Capsule The presence of Ferruginous Pygmy Owls Glaucidium brasilianum breeding in the
xerophytic forest of Caldén Prosopis caldenia in central Argentina was slightly affected by …

Climatic flux together with anthropogenic changes in land use and land cover pose major
threats to wildlife, but our understanding of their combined impacts is limited. In arid …

To address obligations linked to the Pima County Multi-Species Conservation Plan, we
developed and implemented a monitoring program for the Cactus Ferruginous Pygmy-Owl …

Between 2002 and 2005, we studied the influence of roadways on the ecology and behavior
of cactus ferruginous pygmy-owls (Glaucidium brasilianum cactorum) in northern Sonora …