How British Breeding Birds of Prey Are Faring
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The Nest, Eggs, and Diet of the Papuan Harrier from Eastern New Guinea
J. Raptor Res. 44(1):12–18 E 2010 The Raptor Research Foundation, Inc. THE NEST, EGGS, AND DIET OF THE PAPUAN HARRIER FROM EASTERN NEW GUINEA ROBERT E. SIMMONS1 DST/NRF Centre of Excellence, FitzPatrick Institute, University of Cape Town, Rondebosch 7701, South Africa ABSTRACT.—The Papuan Harrier (Circus spilonotus spilothorax), currently classified as a subspecies of the Eastern Marsh-Harrier (C. spilonotus), is endemic to the island of New Guinea and may be in need of conservation attention because of threats from grassland burning. I here detail the discovery of the first known nests in lowland Papua New Guinea and provide egg dimensions and prey data. Both nests were initiated in early April, in damp rank grassland, and contained three small chicks in mid-May. The only egg measurements, combined with one previously published record, suggest large egg volume and concomitant large female body size (estimated to be ca. 890 g). At this size, this may be the world’s largest harrier. Fire destroyed both nests within 5 wk of their discovery. An atypically slow foraging style and a preponderance of game birds and large rats (Rattus spp.) in the pellets and prey remains are consistent with large body size. Further studies of the bird’s ecology and breeding are needed for a comprehensive understanding of its conservation status and threats to its population. KEY WORDS: Papuan Harrier; Circus spilonotus spilothorax; Eastern Marsh-Harrier; Circus spilonotus; body size; diet; egg size; foraging; Papua New Guinea. NIDO, HUEVOS Y DIETA DE CIRCUS SPILONOTUS SPILOTHORAX DEL ESTE DE NUEVA GUINEA RESUMEN.—Circus spilonotus spilothorax, actualmente clasificada como una subespecie de C. -
Harrier References
Introduction This is the final version of the Harrier's list, no further updates will be made. Grateful thanks to Wietze Janse and Tom Shevlin (www.irishbirds.ie) for the cover images and all those who responded with constructive feedback. All images © the photographers. Please note that this and other Reference Lists I have compiled are not exhaustive and are best employed in conjunction with other sources. Joe Hobbs Index The general order of species follows the International Ornithologists' Union World Bird List (Gill, F. & Donsker, D. (eds.) 2019. IOC World Bird List. Available from: https://www.worldbirdnames.org/ [version 9.1 accessed January 2019]). Final Version Version 1.4 (January 2019). Cover Main image: Western Marsh Harrier. Zevenhoven, Groene Jonker, Netherlands. 3rd May 2011. Picture by Wietze Janse. Vignette: Montagu’s Harrier. Great Saltee Island, Co. Wexford, Ireland. 10th May 2008. Picture by Tom Shevlin. Species Page No. African Marsh Harrier [Circus ranivorus] 8 Black Harrier [Circus maurus] 10 Cinereous Harrier [Circus cinereus] 17 Eastern Marsh Harrier [Circus spilonotus] 6 Hen Harrier [Circus cyaneus] 11 Long-winged Harrier [Circus buffoni] 9 Malagasy Harrier [Circus macrosceles] 9 Montagu's Harrier [Circus pygargus] 20 Northern Harrier [Circus hudsonius] 16 Pallid Harrier [Circus macrourus] 18 Papuan Harrier [Circus spilothorax] 7 Pied Harrier [Circus melanoleucos] 20 Réunion Harrier [Circus maillardi] 9 Spotted Harrier [Circus assimilis] 9 Swamp Harrier [Circus approximans] 7 Western Marsh Harrier [Circus aeruginosus] 4 1 Relevant Publications Balmer, D. et al. 2013. Bird Atlas 2001-11: The breeding and wintering birds of Britain and Ireland. BTO Books, Thetford. Beaman, M. -
Gender Determination in the Western Marsh Harrier (Circus Aeruginosus ) Using Morphometrics and Discriminant Analysis
J. Raptor Res. 40(1):000–000 E 2006 The Raptor Research Foundation, Inc. GENDER DETERMINATION IN THE WESTERN MARSH HARRIER (CIRCUS AERUGINOSUS ) USING MORPHOMETRICS AND DISCRIMINANT ANALYSIS CHRISTIAN BAVOUX Le Marais aux Oiseaux, Les Grissotie`res, 17550 Dolus-d’Ole´ron, France GUY BURNELEAU 2, rue du Port de Chiffeu, Mauzac, 17320 Saint-Just-Luzac, France VINCENT BRETAGNOLLE1 Centre d’Etudes Biologiques de Chize´, Centre National de la Recherche Scientifique, 79360 Beauvoir-sur-Niort, France ABSTRACT.—When adult, the gender of Western Marsh Harriers (Circus aeruginosus) are determined on the basis of the presence of gray feathers on the wing and on the tail in the males. However, males of this species in southwestern France have female-like plumages, lacking gray feathers, and thus, gender determination is impossible by using coloration alone. We investigated sex determination using biometric parameters in a study site located in southwestern France. From one to six measurements (body mass, bill length, wing chord length, tarsus length and width, and tail length) were taken from 243 marsh harriers of known gender (156 males and 87 females), marked in the study site, and subsequently re-sighted. Additionally, 30 marsh harriers specimens were measured by two observers to establish within and between observer repeatability values, as well as within bird repeatability for the six biometric parameters. Using quadratic Discriminant Analysis, we showed that it was possible to sex individuals of this species with .99% accuracy on the basis of only two parameters: bill length and body mass. Actually, using bill length alone provides very good indication of gender (accuracy . -
112 Western Marsh Harrier Put Your Logo Here
Javier Blasco-Zumeta & Gerd-Michael Heinze Sponsor is needed. Write your name here 112 Western Marsh Harrier Put your logo here SIMILAR SPECIES Males of Montagu’s Harrier and Hen Ha- rrier are pale lack of brown colour on wings and body; females and juveniles of Montagu’s Harrier and Hen Harrier have white rumps and lack of pale patch on head and forearms. Montagu’s Harrier. Adult. Male Marsh Harrier. Adult. Male (09-II). WESTERN MARSH HARRIER (Circus aeruginosus ) IDENTIFICATION 44-56 cm. Adult male with pale head; chestnut upperparts; grey wings with black tips; pale blue-grey tail; brown reddish underparts. Fe- male dark brown with pale crown, throat and forewings. Juvenile similar to a female . Montagu’s Harrier. Adult. Marsh Harrier. Female Adult. Male: pat- tern of head and wing. Hen Harrier. Adult. Male. Marsh Harrier. Adult. Female: pattern of head and wing. Hen Harrier. Adult. Female. http://blascozumeta.com Write your website here Page 1 Javier Blasco-Zumeta & Gerd-Michael Heinze Sponsor is needed. Write your name here 112 Western Marsh Harrier Put your logo here SEXING All ages, in extreme birds, can be sexed by wing length: male with wing shorter than 390 Marsh Harrier. mm; female with wing longer than 410 mm. Ageing. Pat- tern of the outermost tail AGEING feather: left 3 age groups in females and 4 in males can be adult female; recognized: right juvenile. Juvenile with one age of very fresh feathers, without moult limits; dark brown iris; tip of greater and primary coverts forming a clear thin line; from below, flight feathers pale grey- brown being secondaries with the same colour than primaries; dark brown tail. -
BB March 2013
Plumage variability in Marsh Harriers Jean-François Blanc, Audrey Sternalski and Vincent Bretagnolle Abstract The Marsh Harrier Circus aeruginosus is typically illustrated in field guides as a sexually dimorphic species, with several age classes identifiable by differences in plumage pattern and colour. In some populations, however, such as the one we studied in west-central France, the species can show extreme plumage variability in adult males and, to a lesser extent, in adult females. Our study population is markedly polymorphic, with highly distinct patterns of coloration and almost continuous individual variation between those different morphs. Barely a single adult male looks like a typical ‘field-guide male’. Since this plumage variability is independent of age and sex, it is almost impossible to age birds solely from their plumage, which contradicts the established view. We highlight the difficulties of ageing and sexing Marsh Harriers by plumage only, and advocate the recognition of this species as polymorphic, at least in some parts of its range. Introduction Forsman 1999). Both sexes become some - The Marsh Harrier Circus aeruginosus is typi - what paler with age, which may be more pro - cally illustrated as a sexually dimorphic nounced in males than in females (Forsman species in the literature, with distinctive adult 1999; van Duivendijk 2011). Despite recent male, adult female and juvenile plumages advances in digital technology, no recent (e.g. Cramp & Simmons 1980, Forsman publications or reviews based on photo - 1999, Ferguson-Lees & Christie 2001, van graphic evidence have acknowledged the Duivendijk 2011). Adult males are typically existence of individual plumages that do not trichromatic, with black wing-tips, brown fit this classic view, even though discrepan - upperwing-coverts and silvery-grey mid- cies may occur at the population level (see wing and tail, whereas adult females are below). -
Eastern Marsh Harrier Circus Spilonotus Photographed in Chennai, Tamil Nadu, Southern India Gnanaskandan Kesavabharathi & Chandrashekar Sundaram
KESAVABHARATHI & SUNDARAM: Eastern Marsh Harrier 75 Eastern Marsh Harrier Circus spilonotus photographed in Chennai, Tamil Nadu, southern India Gnanaskandan Kesavabharathi & Chandrashekar Sundaram Kesavabharathi, G., & Sundaram, C., 2016. Eastern Marsh Harrier Circus spilonotus photographed in Chennai, Tamil Nadu, southern India. Indian BIRDS 11 (3): 75–76. Gnanaskandan Kesavabharathi, No. 2B Mithila Block, Saibrindavan Apartments, Ramakrishna Nagar, 2nd Main Road, Adambakkam, Chennai 600088, Tamil Nadu, India. E-mail: [email protected] [GK] Chandrashekar Sundaram, No. 18, Thilakar Street, Krishna Nagar Extension, Ullagaram, Chennai 600091, Tamil Nadu, India. E-mail: [email protected][CS] Manuscript received on 20 February 2016. he Eastern Marsh Harrier Circus spilonotus was formerly considered a conspecific of the Western Marsh HarrierCircus Taeruginosus. It has been considered a winter visitor to parts of north–eastern India, but is a vagrant elsewhere (Ali & Ripley 2001;Grimmett et al. 2001; Naoroji 2006). In fact, Rasmussen & Anderton (2005) listed this species as hypothetical since there were no established specimens from South Asia. However, they included it in the second edition of their work (Rasmussen & Anderton 2012) on the basis of a recent photograph (see below). While sub-adults of the species are harder to separate from either the Western Marsh-, or the Pied Harrier C. melanoleucos, identification of adult birds is generally straightforward. Here we report a first sighting of an adult male Eastern Marsh Harrier, with photographic evidence, from Chennai, Tamil Nadu. 93. On 06 February 2016, we sighted an Eastern Marsh Harrier male flying on the periphery of a lake near Irungattukottai, Chennai (13.02°N, 79.98°E); CS photographed it [92-94]. -
THE MIGRATION of STEPPE EAGLES &Lpar;<I>AQUILA NIPALENSIS</I>&Rpar; and OTHER RAPTORS in CENTRAL NEPAL, AUTU
j. RaptorRes. 35(1):35-39 ¸ 2001 The Raptor ResearchFoundation, Inc. THE MIGRATION OF STEPPE EAGLES (AQUILA NIPAI.ENSIS) AND OTHER RAPTORS IN CENTRAL NEPAL, AUTUMN 1999 ROBERT DECANDIDO Departmentof Ecology and EvolutionaryBiology, The GraduateCenter of the City Universityof New York,Suite 4315, 365 Fifth Avenue,New York,NY 10016-4309U.S.A. DEBORAH ALLEN The LinnaeanSociety of New York,PO. Box 1452, PeterStuyvesant Station, New York,NY 10009 U.S.A. KEITH L. BILDSTEIN Hawk MountainSanctuary, 1700 Hawk MountainRoad, Kempton, Pennsylvania 19529 U.S.A. A•ST•CT.--Counts of migrating Steppe Eagles (Aquila nipalensis)and at least eight other speciesof raptorswere made at Khare, a raptor-migrationwatchsite in central Nepal, on nine days(27 October- 4 November) in autumn 1999. Totals of 821 migrating Steppe Eagles (15.2 birds/h) and 129 other migrating raptors (2.4 birds/h), including the globally vulnerable LesserKestrel (Falconaumanni) (0.2 birds/h), were seen at the watchsite.Individuals representing 10 additional speciesthat could not be distinguishedas migrantsversus local residentsalso were seen, but were not included in the count. Most autumn migrants at Khare are believed to repl'esentindividuals from populations of raptors that breed in central and eastern Asia and overwinter in southeastern and southwestern Asia, the Indian Subcon- tinent, and Africa. Raptor migration appears to be a regular and predictable phenomenon at the site, leading us to recommend its use by local residents,as a source of ecotourism revenue and as a focal point for environmental-educationactivity for school children, and by raptor conservationists,as a con- tinentally significantmonitoring site. -
Roosting Behaviour of Marsh and Montagu´S Harriers During Migration
Roosting behaviour of Marsh and Montagu´s Harriers during migration ANNERIEK VAN GASTEREN SUPERVISOR: RAYMOND KLAASSEN Master project RuG Migratory roosting behaviour of Harriers Anneriek van Gasteren TABLE OF CONTENTS Table of contents ........................................................................................................................................ 1 Summary ...................................................................................................................................................... 2 Introduction ................................................................................................................................................. 3 Roosting behaviour during migration ........................................................................................... 4 Research questions ............................................................................................................................ 5 Citizen science ..................................................................................................................................... 6 Material and methods ............................................................................................................................... 7 Data collection ..................................................................................................................................... 7 Identifying nightroost during migratory period ......................................................................... 7 Scoring -
The Migration of Steppe Eagles (Aquila Nipalensis) and Other Raptors in Central Nepal, Autumn 1999
J. Raptor Res.35(1):35-39 @ 2001 The Raptor Research Foundation, Inc. THE MIGRATION OF STEPPEEAGLES (AQUILA NIPALENSIS)AND OTHER RAPTORS IN CENTRAL NEPAL, AUTUMN 1999 ROBERT DECANDIDO Department ofEcology and Evolutionary Biology, The Graduate Center of the City University ofNew York, Suite 4315, 365 Fifth Avenue, New York,NY 10016-4309 U.S.A. DEBORAH ALLEN The Linnaean Society ofNew York, P.O. Box 1452, Peter Stuyvesant Station, New York,NY 10009 U.S.A. il Ii r KEITH L. BILDSTEIN I, Hawk Mountain Sanctuary, 1700 Hawk Mountain Road, Kempton, Pennsylvania 19529 U.S.A. ~ ABsTRACf.-Counts of migrating Steppe Eagles (Aquila niPalensis)and at least eight other species of raptors were made at Khare, a raptor-migration watchsite in central Nepal, on nine days (27 October- 4 November) in autumn 1999. Totals of 821 migrating Steppe Eagles (15.2 birds/h) and 129 other ~ migrating raptors (2.4 birds/h), including the globally vulnerable Lesser Kestrel (Falco naumannl) (0.2 i birds/h)', were seen at the watchsite. Individuals representing 10 additional species that could not be " distinguished as migrants versus local residents also were seen, but were not included in the count. Most autumn migrants at Khare are believed to represent individuals from populations of raptors that breed in central and eastern Asia and overwinter in southeastern and southwestern Asia, the Indian Subcon- tinent, and Mrica. Raptor migration appears to be a regular and predictable phenomenon at the site, leading us to recommend its use by local residents, as a source of ecotourism revenue and as a focal point for environmental-education activity for school children, and by raptor conservationists, as a con- tinentally significant monitoring site. -
Marsh Harrier
Circus aeruginosus 1. INTRODUCTION The marsh harrier (western marsh harrier) is increasing as a breeding species in Great Britain (Gibbons et al., 1993; Underhill-Day,Marsh 1998; Holling & RBBP, Harrier 2008) with breeding recorded as far north as Orkney (Bell, 2007). A pair of marsh harriers that fledged two young in Northern Ireland in 2009 represents the first recorded breeding by this species since about 1840. In the Republic of Ireland, breeding has not been confirmed since 1917, although regular sightings of marsh harriers in suitable habitat suggest that the species is likely to recolonise in the near future. British and Irish marsh harriers are partial migrants (Underhill-Day, 2002a). A few individual birds, mostly females, winter in the south and east of England, south Wales and southeast Ireland. Ringing recoveries of British birds show that they migrate into Iberia and northwest Africa. Migratory birds from northern Europe and Scandinavia may cross the Sahara to winter in central and southern Africa as far south as the Transvaal (Underhill-Day, 2002a). During migration, passage birds can be seen in areas where they do not breed or winter. Adult male marsh harriers have a distinctive plumage, with black wingtips, a grey wing panel and tail, and a dark brown back (Clarke, 1995). The adult female’s plumage is more variable; the body and wings are brown, and the crown and chin are yellow or pale. Juveniles and immatures resemble females (though they may lack pale markings on the head) and begin to moult into adult plumage in their second calendar year. Juvenile males can be separated from females by their smaller size. -
Eastern Marsh Harrier Circus Spilonotus from Irinjalakuda, Thrissur, Kerala, India
76 Indian BIRDS VOL. 13 NO. 3 (PUBL. 29 JUNE 2017) individual as a Mishmi Wren-babbler. Sound recordings deposited Alinye is just 33 km from the Line of Control (between China and in the Avian Vocalizations Center (AVoCet; avocet.zoology.msu. India), the border is along ridges above 3500 m asl and mostly edu: AV# 20013, 20014) include songs that strongly resemble much higher, so this species seems unlikely to have been able to those of birds from farther south. Thus, there is no reasonable cross into Tibet, even though small areas of apparently suitable doubt as to the identity of the Alinye bird being a Mishmi Wren- habitat, and elevation, occur in valleys there. babbler. The bird was extremely confiding and demonstrative, making no attempt to remain hidden, coming out several times Acknowledgements onto low branches, and remaining there for several seconds before moving to another one. It eventually moved into a hidden We thank the Government of Arunachal Pradesh for permission to enter the state. Our travel and birding companion, Roon Bhuyan, also provided transport. Nikhil Devasar, position from which it sang repeatedly. Prior to this sighting, RM Asian Adventures, organised our travel. Praveen J. provided helpful information. Aniko had documented at least five individuals of this species from Mihu and Wendu Miso of Alinye Tourist Lodging gave welcome hospitality. PCR thanks Anini–Mipi road (c. 28.62°N, 95.90°E) on 08 June 2016, and 02 the Delia Koo Global Faculty Endowment, and Siddharth Chandra, Asian Studies July 2016, in roadside undergrowth around 1610 m asl. -
Marsh Harrier
Circus aeruginosus 1. INTRODUCTION The marsh harrier (western marsh harrier) is increasing as a breeding species in Great Britain (Gibbons et al., 1993; Underhill-Day,-ARSH 1998; Holling & RBBP,(ARRIER 2008) with breeding recorded as far north as Orkney (Bell, 2007). A pair of marsh harriers that fledged two young in Northern Ireland in 2009 represents the first recorded breeding by this species since about 1840. In the Republic of Ireland, breeding has not been confirmed since 1917, although regular sightings of marsh harriers in suitable habitat suggest that the species is likely to recolonise in the near future. British and Irish marsh harriers are partial migrants (Underhill-Day, 2002a). A few individual birds, mostly females, winter in the south and east of England, south Wales and southeast Ireland. Ringing recoveries of British birds show that they migrate into Iberia and northwest Africa. Migratory birds from northern Europe and Scandinavia may cross the Sahara to winter in central and southern Africa as far south as the Transvaal (Underhill-Day, 2002a). During migration, passage birds can be seen in areas where they do not breed or winter. Adult male marsh harriers have a distinctive plumage, with black wingtips, a grey wing panel and tail, and a dark brown back (Clarke, 1995). The adult female’s plumage is more variable; the body and wings are brown, and the crown and chin are yellow or pale. Juveniles and immatures resemble females (though they may lack pale markings on the head) and begin to moult into adult plumage in their second calendar year. Juvenile males can be separated from females by their smaller size.