- 420 pages
- English
- ePUB (mobile friendly)
- Available on iOS & Android
eBook - ePub
The Sparrowhawk
About this book
Dr Newton is now a senior ornithologist with the Natural Environment Research Council and the book draws on his wide knowledge of the Sparrowhawk, as well as that of other workers in Britain and abroad.
The text gives a detailed account of all aspects of the Sparrowhawk's lifestyle, population levels and trends, and the impact of man and environment on the species in recent times.
The book also has the benefit of Dr Newton's particular interest in population regulation and breeding performance, and in the remarkable contrast in size between the Sparrowhawk sexes (males being half the weight of females), which means that they diverge, almost as separate species, in habitat preference, diet and in response to circumstance.
The narrative is fully supported by diagrams, tables and photographs, and is embellished by Keith Brockie's evocative and accomplished drawings.
The text gives a detailed account of all aspects of the Sparrowhawk's lifestyle, population levels and trends, and the impact of man and environment on the species in recent times.
The book also has the benefit of Dr Newton's particular interest in population regulation and breeding performance, and in the remarkable contrast in size between the Sparrowhawk sexes (males being half the weight of females), which means that they diverge, almost as separate species, in habitat preference, diet and in response to circumstance.
The narrative is fully supported by diagrams, tables and photographs, and is embellished by Keith Brockie's evocative and accomplished drawings.
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Yes, you can access The Sparrowhawk by Ian Newton in PDF and/or ePUB format, as well as other popular books in Biological Sciences & Zoology. We have over one million books available in our catalogue for you to explore.
Information
Tables 1–63
TABLE 1: Wing lengths of Sparrowhawks of different sex and age, from birds trapped in south Scotland. SD = standard deviation, SE = standard error.
| Age (years) | No. | Mean | SD | SE | Range | |
| Males | 1 | 41 | 198·95 | 3·71 | 0·58 | 192–209 |
| 2 | 58 | 200·00 | 3·68 | 0·48 | 193–209 | |
| 3 | 18 | 200·89 | 4·60 | 1·08 | 193–211 | |
| All adults (2+) | 171 | 199·52 | 3·98 | 0·30 | 188–211 | |
| Females | 1 | 98 | 234·10 | 4·59 | 0·46 | 223–246 |
| 2 | 119 | 235·13 | 4·58 | 0·42 | 224–247 | |
| 3 | 43 | 236·93 | 5·23 | 0·80 | 226–251 | |
| All adults (2+) | 476 | 236·63 | 4·81 | 0·22 | 222–251 | |
Significance of differences: males, l v 2, t97 = 1·39, ns; 2 v 3, t74 = 0·84, ns; l v 2+ , t210 = 0·83, ns; females, l v 2, t215 = l·65, P<0·1; 2 v 3, t160 = 2·13, P<0·05, l v 2+, t144 = 4·97, P< 0·001; ns – not significant.
TABLE 2: Sparrowhawk iris colour in relation to age and sex, south Scotland. From Newton & Marquiss 1982b.
| Lemon: shades | Yellow: shades | Orange: shades | Red: shades | ||||||||
| Age from hatch | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Mean shade |
| Males | |||||||||||
| 2 months (August) | 3 | 5 | 14 | 1 | 3 | 2·85 | |||||
| 3 months (September) | 2 | 9 | 3 | 1 | 3·07 | ||||||
| 1 year (April–July) | 4 | 7 | 15 | 2 | 4·54 | ||||||
| 2 year (April–July) | 4 | 12 | 21 | 2 | 6·54 | ||||||
| 3 year (April–July) | 1 | 2 | 4 | 1 | 1 | 6·89 | |||||
| 4 year (April–July) | 2 | 1 | 3 | 1 | 6·43 | ||||||
| 5 + year (April–July) | 1 | 3 | 1 | 1 | 7·91 | ||||||
| Females | |||||||||||
| 2 months (August) | 1 | 5 | 12 | 2·61 | |||||||
| 3 months (September) | 1 | 4 | 7 | 2·50 | |||||||
| 1 year (April–July) | 1 | 8 | 25 | 24 | 1 | 4·27 | |||||
| 2 year (April–July) | 19 | 46 | 13 | 6 | 5·07 | ||||||
| 3 year (April–July) | 3 | 14 | 9 | 7 | 1 | 5·68 | |||||
| 4 year (April–July) | 2 | 4 | 8 | 6 | 1 | 6·00 | |||||
| 5 year (April–July) | 2 | 9 | 8 | 2 | 5·48 | ||||||
| 6 year (April–July) | 2 | 4 | 3 | 1 | 5·30 | ||||||
| 7 year (April–July) | 3 | 1 | 3 | 2 | 5·44 | ||||||
| 8 year (April–July) | 1 | 1 | 1 | 1 | 5·50 | ||||||
Notes: For χ2 tests, records were grouped in colour categories 1–3, 4·6 and 7–10. Comparing August/September with year 1: males. χ2 = 26·7, P<0·001; females, χ2 = 54·0, P<0·001; year 1 with year 2: males, χ2 = 26·5, P<0·001, females, χ22 = 17·5, P<0·001; year 2 with year 3: males, χ2 = 0·002, ...
Table of contents
- Cover
- Copyright page
- Contents
- List of plates
- List of figures
- List of tables
- Acknowledgements
- Chapter 01 - Background, study areas and methods
- Chapter 02 - The Sparrowhawk
- Chapter 03 - Nesting habitat
- Chapter 04 - Nest spacing and breeding density
- Chapter 05 - Ranging behaviour
- Chapter 06 - Population trends
- Chapter 07 - Hunting and feeding behaviour
- Chapter 08 - Food
- Chapter 09 - The Sparrowhawk as a predator
- Chapter 10 - Breeding season
- Chapter 11 - The breeding cycle: early stages
- Chapter 12 - The breeding cycle: eggs and incubation
- Chapter 13 - The breeding cycle: growth of young
- Chapter 14 - The breeding cycle: parental care
- Chapter 15 - The breeding cycle: post-fledging period
- Chapter 16 - Seasonal trend in breeding success
- Chapter 17 - Nest failures
- Chapter 18 - Age and breeding
- Chapter 19 - Moult
- Chapter 20 - Dispersal
- Chapter 21 - Territory and mate fidelity
- Chapter 22 - Migration
- Chapter 23 - Mortality
- Chapter 24 - Effects of pesticides
- Chapter 25 - Conclusions
- Appendix 01 - Finding nests
- Appendix 02 - Persecution of Sparrowhawks
- Appendix 03 - Procedures for analyses of nest spacing and prey densities, relevant to Chapter 4
- Appendix 04 - Causes and diagnosis of nest failure
- Bibliography
- Tables