Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (393.0 KB bytes)

Title: Calling behavior of spotted owls in Northern Arizona

Author: Ganey, Jospeh L.;

Date: 1990

Source: The Condor. 92: 485-490.

Publication Series: Scientific Journal (JRNL)

Description: 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. Males (n = 4) called twice as frequently as females (n = 3), and there also appeared to be intrasexual differences in calling rates. Calling activity increased from March through May, then declined from June through November. Calling activity was highest during the 2-hr period following sunset, with smaller peaks 4-8 hr after sunset and just before sunrise. Calling bouts averaged 9.9 min in duration, and were significantly longer when other owls were calling. Owls called more than expected during the last quarter and new moon phases of the lunar cycle, and called most frequently on calm, clear nights when no precipitation was falling. The timing and nature of Spotted Owl calls suggests that calling behavior may be as important in intrapair communication as in territory advertisement. Differences in calling rates among owls suggest that not all owls will be equally detectable using calling surveys.

Keywords: Arizona, calling behavior, call types, Mexican Spotted Owl, Strix occidentalis lucida

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Ganey, Jospeh L. 1990. Calling behavior of spotted owls in Northern Arizona. The Condor. 92: 485-490.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.