We conducted a meta-analysis of population data for 4 populations in the southern Cascades and Sierra Nevada, California, USA, from 1990 to 2005 to assist a listing evaluation by the United States Fish and Wildlife Service. The common barn owl, long-eared owl and short-eared owl populations are in decline. The regu- larly occupied home ranges also produce more fledg- lings than other sites, indicating a match between preferred habitat and productivity (Korpimaki 1988). The owl population has seen a decline over the past decades caused by hunting, lack of prey and habitat, and viral diseases. While it is true that the majority of snakes are relatively harmless, a small number of North American species are considered extremely dangerous to humans due to their aggressiveness and deadly venom. Several owl species prey on insects have seen numbers drop after consuming insects sprayed with insecticide and is most evident in the burrowing owl. Western Burrowing Owl in the United States David S. Klute U.S. Now that the United States population is being exposed to environmental issues, the general population will most likely want to protect their natural resources and the species that live in them such as owls. Fish and Wildlife Service, …
the United States Endangered Species Act despite petitions to list it as threatened. Fish and Wildlife Service, david.klute@state.co.us Loren W. Ayers University of Wyoming, ayersl@mail01.dnr.state.wi.us Michael T. Green U.S. Fish and Wildlife Service, michael_green@fws.gov William H. Howe U.S.

Based on limited information, the persistence of great gray owl populations in the United States over both the short and long-term is more certain. Throughout the United States and Canada, there exists a handful of snake species capable of causing serious injuries (including death) to humans. ABSTRACT The California spotted owl (Strix occidentalis occidentalis ) is the only spotted owl subspecies not listed as threatened or endangered under the United States Endangered Species Act despite petitions to list it as threatened. Fish and Wildlife Service, bill_howe@fws.gov Stephanie L. Jones U.S. We conducted a meta‐analysis of population data for 4 populations in the southem Cascades and Sierra Nevada, California, USA, from 1990 to 2005 to assist … This paper was written to give the reader an overview of some of the greatest concerns for human-owl interactions.
flammulated owl in the united States is now well understood (Chapter 3 and Map 1). Furthermore, the population biology of both species necessitates across-region planning to facilitate effective conservation planning.

The populations of eastern screech-owls, great horned owls, barred owls and northern saw-whet owls are stable and even increasing. During prey population declines in Fin- land, owl home ranges with a high proportion of spruce forest are consistently occupied while other ranges are only used during prey peaks. The northeastern United States is home to seven types of owls.