Status of the Loggerhead Shrike in the Northcentral United States
Author: Helen M. Hands
Publisher:
Published: 1989
Total Pages: 28
ISBN-13:
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Author: Helen M. Hands
Publisher:
Published: 1989
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKAuthor: Michael Derrick Cadman
Publisher:
Published: 1991
Total Pages: 34
ISBN-13:
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Publisher:
Published: 1992
Total Pages: 414
ISBN-13:
DOWNLOAD EBOOKAuthor: William Charles Hunter
Publisher:
Published: 1990
Total Pages: 220
ISBN-13:
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Publisher:
Published: 1999
Total Pages: 302
ISBN-13:
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Publisher:
Published: 2000
Total Pages: 574
ISBN-13:
DOWNLOAD EBOOKAuthor: Thomas C. Grubb Jr.
Publisher: OUP Oxford
Published: 2006-06-29
Total Pages: 189
ISBN-13: 0191516260
DOWNLOAD EBOOKThis is the first book to summarize the methods, conceptual issues and results of studies using the interpretation of feather growth rates as an index of nutritional condition in birds. The author has coined the term ptilochronology (literally, 'the study of feather time') to describe this technique, which relies on the fact that as a feather grows it produces visible growth bars. Both the technique and its conceptual foundations have been applied worldwide to numerous studies of avian evolution, ecology, and conservation biology. The author reviews this work, chronicles the various criticisms that have been made, and describes how these have influenced the development of ptilochronology. He goes on to suggest experimental methodologies and analytical techniques to safeguard against invalid results. A final chapter summarises this new technique's contribution to avian biology, and suggests potential applications and a future research agenda. An appendix details specific measurements and describes the methodology associated with ptilochronology. Ptilochronology provides a practical resource as well as a conceptual understanding of how this technique can be used to address important questions in avian biology. It will be of relevance and use to professional avian biologists and ornithologists as well as to graduate students of avian behavioural ecology, evolution and conservation.
Author:
Publisher:
Published: 2004
Total Pages: 176
ISBN-13:
DOWNLOAD EBOOK"Volume 2 (this volume) describes wildlife and fish species, their habitat requirements, and species-specific management concerns, in Southwestern grasslands. This assessment is regional in scale and pertains primarily to lands administered by the Southwestern Region of the USDA Forest Service (Arizona, New Mexico, western Texas, and western Oklahoma)."--Abstract.
Author: Jennifer L. Sieracki
Publisher:
Published: 2002
Total Pages: 76
ISBN-13:
DOWNLOAD EBOOKAuthor: Pete Dunne
Publisher: Houghton Mifflin
Published: 2021
Total Pages: 293
ISBN-13: 0358164079
DOWNLOAD EBOOKFocusing on families and their shared traits makes bird identification easier than ever. This guide takes readers beyond merely identifying birds to understanding them. Many birders can tell the difference between a White-eyed and Bell's Vireo but cannot begin to describe a vireo and what distinguishes members of this family from warblers or flycatchers. The "species by species" approach makes it difficult to appreciate birds for what they are: members of well-organized groupings united by common traits. Putting the focus on families, and their shared characteristics, makes bird identification easier and more meaningful. More than 150 color photos illustrate the 81 bird families of the United States and Canada.