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The Raptor Center at the University of Minnesota

 

 

USDA Forest Service          
1997
General Technical Report NC-190

Biology and Conservation of Owls of the Northern Hemisphere

Second International Symposium

February 5-9, 1997


Winnipeg, Manitoba, Canada

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TABLE OF CONTENTS

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Introduction and Owl Photographs

brnbtn.gif (993 bytes) Invited Speakers
brnbtn.gif (993 bytes) Banquet Speakers
brnbtn.gif (993 bytes) Symposium Papers
brnbtn.gif (993 bytes) Poster Papers and Other Presentations
brnbtn.gif (993 bytes) Workshops
brnbtn.gif (993 bytes) Index


INTRODUCTION and Owl photographs

Page #
I-IX

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Owl photographs continue through page XV.

X-XI download PDF file  (161k) Images/pdficon.gif (1194 bytes)
  XII-XIII download PDF file (160k) Images/pdficon.gif (1194 bytes)

Table of Contents begins on page XVI.

XIV-XXII download PDF file (178k) Images/pdficon.gif (1194 bytes)


INVITED SPEAKERS


Official Opening Remarks: Manitoba Natural Resources
Merlin W. Shoesmith 
 

Page #
1


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Official Opening Remarks: Manitoba's Biodiversity and Sustainable Development
Brian C. Gillespie
3 download PDF file (10k) Images/pdficon.gif (1194 bytes)
Official Opening Remarks: Bird Conservation in Canada
Michael S.W. Bradstreet
4 download PDF file  (37k) Images/pdficon.gif (1194 bytes)


BANQUET SPEAKERS


Remaining Choices
Katherine McKeever
Page #
6

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Summary and Concluding Remarks
Richard J. Clark
11 download PDF file (226k) Images/pdficon.gif (1194 bytes)


SYMPOSIUM PAPERS


The Hunting Behavior of Eastern Screech-owls (Otus asio)
Carlo M. Abbruzzese and Gary Ritchison
Page #
21

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Albinism in the Great Gray Owl (Strix nebulosa) and Other Owls
Pentti Alaja and Heimo Mikkola
33 download PDF file (101k) Images/pdficon.gif (1194 bytes)
Breeding Biology of the Barn Owl (Tyto alba) in the Lower Mainland of British Columbia
Lorraine A. Andrusiak and K.M. Cheng
38 download PDF file (153k) Images/pdficon.gif (1194 bytes)
Dispersal Movements of Juvenile Mexican Spotted Owls (Strix occidentalis lucida) in New Mexico
David P. Arsenault, Angela Hodgson, and Peter B. Stacey
47 download PDF file (1257k) Images/pdficon.gif (1194 bytes)
Barn Owl (Tyto alba) and Long-eared Owl (Asio otus) Mortality Along Motorways in Bourgogne-Champagne: Report and Suggestions
Hugues Baudvin
58 download PDF file (101k) Images/pdficon.gif (1194 bytes)
Corticosterone and Dispersal in Western Screech-owls (Otus kennicottii)
James R. Belthoff and Alfred M. Dufty, Jr.
62 download PDF file (88k) Images/pdficon.gif (1194 bytes)
Food Habits of the Northern Spotted Owl (Strix occidentalis caurina) at Six Nest Sites in Washington's East Cascades
Kenneth R. Bevis, Jo Ellen Richards, Gina M. King, and Eric E. Hanson
68 download PDF file (86k) Images/pdficon.gif (1194 bytes)
Autumn Migration of Northern Saw-whet Owls (Aegolius acadicus) in the Middle Atlantic and Northeastern United States: What Observations from 1995 Suggest
David F. Brinker, Katharine E. Duffy, David M. Whalen, Bryan D. Watts, and Kevin M. Dodge
74 download PDF file (264k) Images/pdficon.gif (1194 bytes)
A Spatial Analysis of the Burrowing Owl (Speotyto cunicularia) Population in Santa Clara County, California, Using a Geographic Information System
Janis Taylor Buchanan
90 download PDF file (163k) Images/pdficon.gif (1194 bytes)
Modeling Critical Habitat for Flammulated Owls (Otus flammeolus)
David A. Christie and Astrid M. van Woudenberg
97 download PDF file (236k) Images/pdficon.gif (1194 bytes)
Burrowing Owl (Speotyto cunicularia) Survival in Prairie Canada
Kort M. Clayton and Josef K. Schmutz
107 download PDF file (78k) Images/pdficon.gif (1194 bytes)
Dispersal Behavior and Survival of Juvenile Tawny Owls (Strix aluco) During the Low Point in a Vole Cycle
C.F. Coles and S.J. Petty
111 download PDF file (103k) Images/pdficon.gif (1194 bytes)
Seasonal Distribution of the Great Gray Owl (Strix nebulosa) in Southwestern Alberta
Douglas M. Collister
119 download PDF file (70k) Images/pdficon.gif (1194 bytes)
Burrowing Owl (Speotyto cunicularia) Monitoring and Management Activities in  Manitoba, 1987-1996
Ken D. De Smet
123 download PDF file (86k) Images/pdficon.gif (1194 bytes)
Northern Saw-whet Owls (Aegolius acadicus) Captured at Cape May Point, NJ,  1980-1994: Comparison of Two Capture Techniques
Katharine E. Duffy and Patrick E. Matheny
131 download PDF file (91k) Images/pdficon.gif (1194 bytes)
Habitat Associated with Barred Owl (Strix varia) Locations in Southeastern  Manitoba: A Review of a Habitat Model
James R. Duncan and Amy E. Kearns
138 download PDF file (47k) Images/pdficon.gif (1194 bytes)
You Are What You Eat: Stable Isotope Ecology of Owl Diets in Alberta, Canada
Jason M. Duxbury and Geoffrey L. Holroyd
148 download PDF file (86k) Images/pdficon.gif (1194 bytes)
Sex-biased Dispersal of Young Western Screech-owls (Otus kennicottii) in  Southwestern Idaho
Ethan Ellsworth and James R. Belthoff
155 download PDF file (85k) Images/pdficon.gif (1194 bytes)
Comparative Study of General Public Owl Knowledge in Costa Rica, Central  America and Malawi, Africa
Paula L. Enriquez and Heimo Mikkola
160 download PDF file (109k) Images/pdficon.gif (1194 bytes)
Autumn Populations and Movements of Migrant Northern Saw-whet Owls (Aegolius acadicus) at Little Suamico, Wisconsin
Tom C. Erdman, Tom O. Meyer, Jerry H. Smith, and Debra M. Erdman
167 download PDF file (95k) Images/pdficon.gif (1194 bytes)
The Influence of Broadcast Tape-recorded Calls on Captures of Fall Migrant Northern Saw-whet Owls (Aegolius acadicus) and Long-eared Owls (Asio otus)
David L. Evans
173 download PDF file (56k) Images/pdficon.gif (1194 bytes)
Monitoring Boreal Forest Owls in Ontario Using Tape Playback Surveys with Volunteers
Charles M. Francis and Michael S. W. Bradstreet
175 download PDF file (91k) Images/pdficon.gif (1194 bytes)
Great Horned Owl (Bubo virginianus) Productivity and Home Range Characteristics in a Shortgrass Prairie
Rosemary A. Frank and R. Scott Lutz
185 download PDF file (329k) Images/pdficon.gif (1194 bytes)
Size, Dimorphism, and Related Characteristics of Ciccaba Owls From Guatemala
Richard P. Gerhardt and Dawn McAnnis Gerhardt
190 download PDF file (93k) Images/pdficon.gif (1194 bytes)
Habitat Selection of Northern Saw-whet Owls (Aegolius acadicus brooksi) on the Queen Charlotte Islands, British Columbia
Michael Gill and Richard J. Cannings
197 download PDF file (111k) Images/pdficon.gif (1194 bytes)
Matrix Population Models as a Tool in Development of Habitat Models
Gregory D. Hayward and David B. McDonald
205 download PDF file (115k) Images/pdficon.gif (1194 bytes)
Testosterone, Aggression, and Territoriality in Male Western Screech-owls (Otus kennicottii): Results from Preliminary Experiments
Brian L. Herting and James R. Belthoff
213 download PDF file (84k) Images/pdficon.gif (1194 bytes)
A Sensitivity Analysis of a Map of Habitat Quality for the California Spotted Owl (Strix occidentalis occidentalis) in Southern California
Ellen M. Hines and Janet Franklin
218 download PDF file (601k) Images/pdficon.gif (1194 bytes)
Banding of Asio Owls in south-central Saskatchewan
C. Stuart Houston
237 download PDF file (91k) Images/pdficon.gif (1194 bytes)
Black-flies and Leucocytozoon spp. as Causes of Mortality in Juvenile Great Horned Owls in the Yukon, Canada
D. Bruce Hunter, Christoph Rohner, and Doug C. Currie
243 download PDF file (61k) Images/pdficon.gif (1194 bytes)
Distribution, Abundance, and Habitat Use of Territorial Male Boreal Owls (Aegolius funereus) in Northeast Minnesota
William H. Lane, David E. Andersen, and Thomas H. Nicholls
246 download PDF file (50k) Images/pdficon.gif (1194 bytes)
Habitat Use and Movements of Breeding Male Boreal Owls (Aegolius funereus) in Northeast Minnesota as Determined by Radio Telemetry
William H. Lane, David E. Andersen, and Thomas H. Nicholls
248 download PDF file (50k) Images/pdficon.gif (1194 bytes)
Territories of Flammulated Owls (Otus flammeolus): Is Occupancy a Measure of Habitat Quality?
Brian D. Linkhart and Richard T. Reynolds
250 download PDF file (87k) Images/pdficon.gif (1194 bytes)
Metapopulation Dynamics of a Burrowing Owl (Speotyto cunicularia) Population in Colorado
R. Scott Lutz and David L. Plumpton
255 download PDF file (56k) Images/pdficon.gif (1194 bytes)
Is the Northern Saw-whet Owl (Aegolius acadicus) Nomadic?
Jeffrey S. Marks
260 download PDF file (22k) Images/pdficon.gif (1194 bytes)
A 20-year Study of Barn Owl (Tyto alba) Reproduction in Northern Utah
Carl D. Marti
261 download PDF file (23k) Images/pdficon.gif (1194 bytes)
Flammulated Owls (Otus flammeolus) Breeding in Deciduous Forests
Carl D. Marti
262 download PDF file (82k) Images/pdficon.gif (1194 bytes)
Barred Owl (Strix varia) Nest Site Characteristics in the Boreal Forest of Saskatchewan, Canada
Kurt M. Mazur, Paul C. James, and Shanna D. Frith
267 download PDF file (83k) Images/pdficon.gif (1194 bytes)
Population Densities of Northern Saw-whet Owls (Aegolius acadicus) in
Degraded Boreal Forests of the Southern Appalachians
Timothy C. Milling, Matthew P. Rowe, Bennie L. Cockerel, Timothy A. Dellinger, Johnny B. Gailes, and Christopher E. Hill
272 download PDF file (810k) Images/pdficon.gif (1194 bytes)
Importance of Prairie Wetlands and Avian Prey to Breeding Great Horned Owls (Bubo virginianus) in Northwestern North Dakota
Robert K. Murphy
286 download PDF file (161k) Images/pdficon.gif (1194 bytes)
Mortality Causes in British Barn Owls (Tyto alba), Based on 1,101 Carcasses Examined During 1963-1996
I. Newton, I. Wyllie, and L. Dale
299 download PDF file (110k) Images/pdficon.gif (1194 bytes)
Territorial and Nesting Behavior in Southern Boobook (Ninox novaeseelandiae)
Jerry Olsen and Susan Trost
308 download PDF file (137k) Images/pdficon.gif (1194 bytes)
Landscape Patterns Around Northern Spotted Owl (Strix occidentalis caurina) Nest Sites in Oregon's Central Coast Ranges
J.P. Perkins, J.A. Thrailkill, W.J. Ripple, and K.T. Hershey
314 download PDF file (43k) Images/pdficon.gif (1194 bytes)
Clutch Size Variation in Tawny Owls (Strix aluco) from Adjacent Valley Systems: Can This be Used as a Surrogate to Investigate Temporal and Spatial Variations in Vole Density?
Steve J. Petty and Billy L. Fawkes
315 download PDF file (120k) Images/pdficon.gif (1194 bytes)
Nest Sites and Reproductive Success of Barred Owls (Strix varia) in Michigan
Sergej Postupalsky, Joseph M. Papp, and Lewis Scheller
325 download PDF file (147k) Images/pdficon.gif (1194 bytes)
Effectiveness of Broadcast Surveys in Determining Habitat Use of Ferruginous Pygmy-owls (Glaucidium brasilianum) in Southern Texas
Glenn A. Proudfoot, Jody L. Mays, Sam L. Beasom, and Ralph Bingham
338 download PDF file (44k) Images/pdficon.gif (1194 bytes)
Comparison of Food Habits of the Northern Saw-whet Owl (Aegolius acadicus) and the Western Screech-owl (Otus kennicottii) in Southwestern Idaho Charlotte
(Charley) Rains
339 download PDF file (191k) Images/pdficon.gif (1194 bytes)
Non-territorial Floaters in Great Horned Owls (Bubo virginianus)
Christoph Rohner
347 download PDF file (186k) Images/pdficon.gif (1194 bytes)
Monitoring Finnish Owls 1982Š1996: Methods and Results
Pertti L. Saurola
363 download PDF file (237k) Images/pdficon.gif (1194 bytes)
Abundance and Population Characteristics of Northern Spotted Owls (Strix occidentalis caurina) in Olympic National Park, Washington D.
Erran Seaman
381 download PDF file (44k) Images/pdficon.gif (1194 bytes)
Population Dynamics of Lanyu Scops Owls (Otus elegans botelensis)
L.L. Severinghaus
382 download PDF file (40k) Images/pdficon.gif (1194 bytes)
Owls as Biomonitors of Environmental Contamination
Steven R. Sheffield
383 download PDF file (127k) Images/pdficon.gif (1194 bytes)
Current Status, Distribution, and Conservation of the Burrowing Owl (Speotyto cunicularia) in Midwestern and Western North America
Steven R. Sheffield
399 download PDF file (176k) Images/pdficon.gif (1194 bytes)
Male Eastern Screech-owl (Otus asio) Roosting Behavior: Possible Effects from Nesting Stage and Nest Type
Thomas McK. Sproat
409 download PDF file (56k) Images/pdficon.gif (1194 bytes)
Auditory Surveys for Northern Saw-whet Owls (Aegolius acadicus) in Southern Wisconsin 1986-1996
Ann B. Swengel and Scott R. Swengel
411 download PDF file (112k) Images/pdficon.gif (1194 bytes)
Owl Broadcast Surveys in the Foothills Model Forest, Alberta, Canada
D. Lisa Takats and Geoffrey L. Holroyd
421 download PDF file (227k) Images/pdficon.gif (1194 bytes)
An Update of Demographic Estimates for Northern Spotted Owls (Strix occidentalis caurina) from OregonÕs Central Coast Ranges
James A. Thrailkill, Robert G. Anthony, and E. Charles Meslow
432 download PDF file (218k) Images/pdficon.gif (1194 bytes)
Breeding Population of the Great Gray Owl (Strix nebulosa) in Belarus: Summary of Recent Knowledge
Alexey K. Tishechkin, Wassilij W. Gritschik, Valery N. Vorobiov, and Gennady A. Mindlin
449 download PDF file (105k) Images/pdficon.gif (1194 bytes)
Comparative Food Niche Analysis of Strix Owls in Belarus
Alexey K. Tishechkin
456 download PDF file (118k) Images/pdficon.gif (1194 bytes)
Strategies for Protecting Western Burrowing Owls (Speotyto cunicularia hypugaea) from Human Activities
Lynne A. Trulio
461 download PDF file (44k) Images/pdficon.gif (1194 bytes)
Flammulated Owl (Otus flammeolus) Population and Habitat Inventory at its Northern Range Limit in the Southern Interior of British Columbia
Astrid M. van Woudenberg and David A. Christie
466 download PDF file (184k) Images/pdficon.gif (1194 bytes)
Habitat Fragmentation and Burrowing Owls (Speotyto cunicularia) in Saskatchewan
Robert G. Warnock and Paul C. James
477 download PDF file (99k) Images/pdficon.gif (1194 bytes)
The Effects of Predator Exclusion and Food Supplementation on Burrowing Owl (Speotyto cunicularia) Population Change in Saskatchewan
Troy I. Wellicome, Geoffrey L. Holroyd, Karyn Scalise, and Earl R. Wiltse
487 download PDF file (162k) Images/pdficon.gif (1194 bytes)
Great Gray Owl (Strix nebulosa) Breeding Habitat Use Within Altered Forest Landscapes
Michael B. Whitfield and Maureen Gaffney
498 download PDF file (60k) Images/pdficon.gif (1194 bytes)
Conservation Implications of a Multi-scale Study of Flammulated Owl (Otus flammeolus) Habitat Use in the Northern Rocky Mountains, USA
Vita Wright, Sallie J. Hejl, and Richard L. Hutto
506 download PDF file (161k) Images/pdficon.gif (1194 bytes)


POSTER PAPERS AND OTHER PRESENTATIONS


Winter Owl Surveying in Central Alberta
Barbara H. Beck and James A. Beck, Jr.
Page #
518

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Increase in Distribution Records of Owl Species in Manitoba Based on a Volunteer Nocturnal Survey Using Boreal Owl (Aegolius funereus) and Great Gray Owl (Strix nebulosa) Playback
James R. Duncan and Patricia A. Duncan
519 download PDF file (47k) Images/pdficon.gif (1194 bytes)
Intra- and Interspecific Calling in a Tropical Owl Community
Paula L. Enriquez and J. Luis Rangel Salazar
525 download PDF file (188k) Images/pdficon.gif (1194 bytes)
Increasing Mist Net Captures of Migrant Northern Saw-whet Owls (Aegolius acadicus) with an Audiolure
Thomas C. Erdman and David F. Brinker
533 download PDF file (509k) Images/pdficon.gif (1194 bytes)
A Method for Locating Barred Owl (Strix varia) Nests in the Southern Boreal Forest of Saskatchewan
Shanna D. Frith, Kurt M. Mazur, and Paul C. James
545 download PDF file (33k) Images/pdficon.gif (1194 bytes)
Owls in the Moscow Region: the Results of a 10-year Study
O.S. Grenchenko, S.V.Volkov, and T.V. Sviridova
548 download PDF file (190k) Images/pdficon.gif (1194 bytes)
Estimation of Food Consumption from Pellets Cast by Captive Ural Owls (Strix uralensis)
Aki Higuchi and Manabu T. Abe
551 download PDF file (28k) Images/pdficon.gif (1194 bytes)
Wing Loading in 15 Species of North American Owls
David H. Johnson
553 download PDF file (68k) Images/pdficon.gif (1194 bytes)
Preliminary Investigation of Vocal Variation in the Mexican Spotted Owl (Strix occidentalis lucida): Would Vocal Analysis of the Four-note Location Call be a Useful Field Tool for Individual Identification?
Wendy A. Kuntz and Peter B. Stacey
562 download PDF file (211k) Images/pdficon.gif (1194 bytes)
Range Expansion of Northern Hawk Owls (Surnia ulula) and Boreal Owls (Aegolius funereus) in Nova Scotia
Randy F. Lauff
569 download PDF file (113k) Images/pdficon.gif (1194 bytes)
Snowy Owl (Nyctea scandiaca) Reproduction in Relation to Lemming Population Cycles on Wrangel Island
Irina E. Menyushina
572 download PDF file (125k) Images/pdficon.gif (1194 bytes)
World Distribution of Owlaholics
Heimo Mikkola
583 download PDF file (25k) Images/pdficon.gif (1194 bytes)
The Importance of Old Growth Refugia in the Yukon Boreal Forest to Cavity-nesting Owls
D.H. Mossop
584 download PDF file (35k) Images/pdficon.gif (1194 bytes)
Sex and Age Composition of Great Gray Owls (Strix nebulosa), Winter 1995/1996
Robert W. Nero and Herbert W.R. Copland
587 download PDF file (36k) Images/pdficon.gif (1194 bytes)
Observations of Wintering Snowy Owls (Nyctea scandiaca) at Logan Airport, East Boston, Massachusetts from 1981- 1997
Norman Smith
591 download PDF file (103k) Images/pdficon.gif (1194 bytes)
Using Tape Playback of the Staccato Song to Document Boreal Owl (Aegolius funereus) Reproduction
Dale W. Stahlecker
598 download PDF file (58k) Images/pdficon.gif (1194 bytes)
Landscape Features and Characteristics of Great Gray Owl (Strix nebulosa) Nests in Fragmented Landscapes of Central Alberta
D.P. Stepnisky
601 download PDF file (52k) Images/pdficon.gif (1194 bytes)


WORKSHOPS

Report on the Nocturnal Raptor Monitoring Workshop
Geoffrey L. Holroyd and Lisa Takats
610 download PDF file (41k) Images/pdficon.gif (1194 bytes)
Report on the Western Burrowing Owl (Speotyto cunicularia) Conservation Workshop
Geoffrey L. Holroyd and Troy I. Wellicome
613 download PDF file (38k) Images/pdficon.gif (1194 bytes)
The Role and Management Implications of Modeling Owl Populations and the Habitats They Occupy
Amy E. Kearns
617 download PDF file (39k) Images/pdficon.gif (1194 bytes)
"Mission Possible: Owls in Education"
Marcia J. Wilson
621 download PDF file (103k) Images/pdficon.gif (1194 bytes)


INDEX

634 download PDF file (29k) Images/pdficon.gif (1194 bytes)

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