- 400 pages
- English
- ePUB (mobile friendly)
- Available on iOS & Android
eBook - ePub
Ravens in Winter
About this book
“One of the most interesting discoveries I’ve seen in animal sociobiology in years.” —E.O. Wilson
Why do ravens, often considered solitary birds, share food with one another in the harsh months of winter? At first glance, the behavior seemed to defy the rules of evolutionary biology. Yet the more biologist Bernd Heinrich observed these intelligent corvids, the more fascinating the puzzle became.
In Ravens in Winter, Heinrich presents the groundbreaking ornithological research that redefined our understanding of raven social behavior. Blending meticulous science with vivid storytelling, he explores how ravens cooperate, communicate, and thrive in ways that challenge long-held assumptions about animal behavior.
“Bernd Heinrich is no ordinary biologist. He’s the sort who combines formidable scientific rigor with a sense of irony and an unslaked, boyish enthusiasm for his subject, and who even at his current professorial age seems to do a lot of tree climbing in the line of research.” —David Quammen, The New York Times
Why do ravens, often considered solitary birds, share food with one another in the harsh months of winter? At first glance, the behavior seemed to defy the rules of evolutionary biology. Yet the more biologist Bernd Heinrich observed these intelligent corvids, the more fascinating the puzzle became.
In Ravens in Winter, Heinrich presents the groundbreaking ornithological research that redefined our understanding of raven social behavior. Blending meticulous science with vivid storytelling, he explores how ravens cooperate, communicate, and thrive in ways that challenge long-held assumptions about animal behavior.
“Bernd Heinrich is no ordinary biologist. He’s the sort who combines formidable scientific rigor with a sense of irony and an unslaked, boyish enthusiasm for his subject, and who even at his current professorial age seems to do a lot of tree climbing in the line of research.” —David Quammen, The New York Times
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Yes, you can access Ravens in Winter by Bernd Heinrich in PDF and/or ePUB format, as well as other popular books in Biological Sciences & Biology. We have over one million books available in our catalogue for you to explore.
Information
INDEX
(Page numbers in italics refer to data compiled in graphs.)
acrobatic flight, 186, 218
in courting, 203–5, 206–7
as play behavior, 204, 206–7
Adamant, Vt., nest near, 232–38, 242–45
Adams, Billy, 290
adult pairs:
baits defended by, 151–52, 223–24, 230, 254–60, 264–266, 277, 278, 279, 281, 311
behavior of, 210, 297
feather postures of, 210, 310–11
juveniles chased from bait by, 211, 212–13, 214, 215–216, 223–24, 230–31, 255–257, 277, 278, 310, 311
permanent bonds of, 153
quorks as territorial advertisement calls of, 224–25, 230, 231, 249, 254–56, 257 259, 264, 265, 277, 279, 281, 283, 284, 285, 289, 318
tender exchanges of, 212, 237, 244, 250
territory or domain of, 151–152, 153–55, 165, 186
adults:
communal roosts joined by, 165
fear of baits in juveniles vs., 215–16, 310
feathers of juveniles vs., 126
juveniles’ fear of, 223–24
juveniles’ submissiveness with, 217
mouth color of, 144
size inadequate as distinguishing characteristic of, 333
unmated, feather postures of, 213
unmated, low status of, 217–18
aerial acrobatics, see acrobatic flight
aerial chases, see chases, aerial African brown-necked ravens (Corvus ruficollis), 17
African honeyguides, 63
age distribution, 220, 295
aggressiveness, 121–22
in aerial chases, 170, 171
among crows, 122
recruitment and, 225–26
see also confrontations; fighting
Ahab, King, 23
Aleutian Islands, 21
Allen, Durward L., 55–56
altruism:
reciprocal, 105, 110, 213, ...
Table of contents
- Cover
- Dedication
- Note on the New Edition
- Preface
- An Introduction
- Ravens at a Moose
- Ravens as Hunters and Scavengers
- Calling in Carcass-Openers?
- A Selfish Herd?
- A Corvid Comparison
- What Is Acceptable Evidence?
- Early Winter Confusion
- Are Ravens Hawks or Doves?
- Raven Intelligence
- Short Work of Two Sheep
- A Cow
- The Loner
- Tame Birds from the Nest
- Another Hypothesis
- Territorial Adults and Wandering Juveniles
- Communal Roosts
- Do They Come from a Roost?
- To Catch and Mark a Raven, or Two, or More
- Courting and Displays
- Individuals
- Spring Surprises
- At the Nest
- Raven Calls
- The Residents Keep It All
- Why Be Brave?
- Tradeoffs and Complexities
- The Cage Raisings
- The Last Roundups
- Photographs
- Summary
- Appendix
- About the Author
- Notes
- Index
- Copyright