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Keyword: Mexican Spotted Owl

Improving habitat and connectivity model predictions with multi-scale resource selection functions from two geographic areas

Publications Posted on: April 08, 2019
Context: Habitat loss and fragmentation are the most pressing threats to biodiversity, yet assessing their impacts across broad landscapes is challenging. Information on habitat suitability is sometimes available in the form of a resource selection function model developed from a different geographical area, but its applicability is unknown until tested.

Harbingers of Change: Owls of Mescalero

Lab Notes Posted on: September 06, 2018
For the Mescalero Apache, the owl is a messenger. Often misconstrued as a bad omen, the owls provide a warning that it’s time to pay attention, and that “when the world is changing, we need to listen.”   

Dietary overlap between sympatric Mexican spotted and great horned owls in Arizona

Publications Posted on: August 01, 2018
We estimated diet composition of sympatric Mexican spotted (Strix occidentalis lucida, n = 7 pairs of owls) and great horned owls (Bubo virginianus, n = 4 pairs) in ponderosa pine (Pinus ponderosa) - Gambel oak (Quercus gambelii) forest, northern Arizona. Both species preyed on mammals, birds, and insects; great horned owls also ate lizards. Mammals dominated the diet of both species.

Mexican spotted owl home range and habitat use in pine-oak forest: Implications for forest management

Publications Posted on: August 01, 2018
To better understand the habitat relationships of the Mexican spotted owl (Strix occidentalis lucida), and how such relationships might influence forest management, we studied home-range and habitat use of radio-marked owls in ponderosa pine (Pinus ponderosa) Gambel oak (Quercus gambelii) forest.

Winter Movements and Range Use of Radio-marked Mexican Spotted Owls: An Evaluation of Current Management Recommendations

Publications Posted on: August 01, 2018
We summarized existing knowledge on winter movements and range and habitat use of radio-marked Mexican spotted owls. In light of that information, we evaluated the adequacy of current management guidelines. Seasonal movement or "migration" appears to be a regular feature of the winter ecology of Mexican spotted owls.

Food habits of Mexican Spotted Owls in Arizona

Publications Posted on: August 01, 2018
The Spotted Owl (Strix occidentalis) is most common in mature and old-growth coniferous forests throughout much of its range (Forsman et al. 1984, Laymon 1988, Ganey and Balda 1989a, Thomas et al. 1990). Proximate factors underlying habitat selection in Spotted Owls are understood poorly.

Science verses political reality in delisting criteria for a threatened species: The Mexican spotted owl experience

Publications Posted on: August 01, 2018
The Mexican spotted owl (Strix occidentalis lucida) was listed as a threatened species under the Endangered Species Act (ESA) in April 1993 (USDI 1993). Concomitant with the listing of the owl, a recovery team was appointed to develop a plan to recover the owl, allowing for its removal from the list of threatened and endangered species. The recovery plan - "the plan" - was completed and accepted by the U.S.

Calling behavior of spotted owls in Northern Arizona

Publications Posted on: August 01, 2018
I studied the calling behavior of radio-tagged Mexican Spotted Owls (Strix occidentalis lucida) in northern Arizona. Owls used a variety of calls, with three call types (Four-note Location Call, Contact Call, and Bark Series) accounting for 86% of calling bouts heard. These calls were used by both sexes, but in significantly different proportions.

Using MODIS NDVI phenoclasses and phenoclusters to characterize wildlife habitat: Mexican spotted owl as a case study

Publications Posted on: February 12, 2018
Most uses of remotely sensed satellite data to characterize wildlife habitat have used metrics such as mean NDVI (Normalized Difference Vegetation Index) in a year or season. These simple metrics do not take advantage of the temporal patterns in NDVI within and across years and the spatial arrangement of cells with various temporal NDVI signatures.

Mexican spotted owls, forest restoration, fire, and climate change

Science Spotlights Posted on: October 12, 2017
The Mexican spotted owl is listed as a Threatened Species under the Endangered Species Act and is vulnerable to habitat loss from wildfire and climate change. RMRS scientists are leading a cutting-edge modeling effort to predict the interactive effects of forest restoration, wildfire, and climate change on the distribution, population size, and population connectivity of Mexican spotted owl across the Southwestern United States.  

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