The Unification of the Variable Buzzard
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
White-Tailed Hawk (Geranoaetus Albicaudatus)
D. Oleyar, D. Ethier, L. Goodrich, D. Brandes, R. Smith, J. Brown, and J. Sodergren. 2021. The Raptor Population Index: 2019 Analyses and Assessments. Available at http://rpi-project.org/2019/assessments2019.php Introduction to North American Raptor Conservation Species Assessments We provide species assessments based on trend analyses through 2019 from 76 raptor migration count sites across North America spanning from Canada to Panama. Synthesis of trends at the continental and regional scales can highlight species and/or regions that warrant a closer look in the case of widespread declines or highlight conservation successes in the case of widespread increases. It is important to note that the intent of long-term monitoring efforts like RPI is to identify changes overtime, not necessarily to explain them—that is where focused research efforts come into play. RPI shines a light on species and places in need of closer looks and focused efforts. In these assessments, we provide a summary of the continental and regional migration count trends for each species and highlight species of concern. For complete and/or long-distance migrants such as Osprey, Broad-winged Hawk, Swainson’s Hawk, and Mississippi Kite, where essentially the entire population migrates out of its breeding range to a separate wintering range, the migration count trends provide a reliable assessment of actual population trends. For partial and short-distance migrants such as the Red-tailed Hawk, there is evidence that some species may be shifting their migratory behavior and/or wintering ranges in response to climate change and other factors (Bolgiano, 2013; Paprocki, et al, 2017). -
Ecuador & the Galapagos Islands
Ecuador & the Galapagos Islands - including Sacha Lodge Extension Naturetrek Tour Report 29 January – 20 February 2018 Medium Ground-finch Blue-footed Booby Wire-tailed Manakin Galapagos Penguin Green Sea Turtle Report kindly compiled by Tour participants Sally Wearing, Rowena Tye, Debbie Hardie and Sue Swift Images courtesy of David Griffiths, Sue Swift, Debbie Hardie, Jenny Tynan, Rowena Tye, Nick Blake and Sally Wearing Naturetrek Mingledown Barn Wolf’s Lane Chawton Alton Hampshire GU34 3HJ UK T: +44 (0)1962 733051 E: [email protected] W: www.naturetrek.co.uk Tour Report Ecuador & the Galapagos Islands - including Sacha Lodge Extension Tour Leader in the Galapagos: Juan Tapia with 13 Naturetrek Clients This report has kindly been compiled by tour participants Sally Wearing, Rowena Tye, Debbie Hardie and Sue Swift. Day 1 Monday 29th January UK to Quito People arrived in Quito via Amsterdam with KLM or via Madrid with Iberia, while Tony came separately from the USA. Everyone was met at the airport and taken to the Hotel Vieja Cuba; those who were awake enough went out to eat before a good night’s rest. Day 2 Tuesday 30th January Quito. Weather: Hot and mostly sunny. The early risers saw the first few birds of the trip outside the hotel: Rufous- collared Sparrow, Great Thrush and Eared Doves. After breakfast, an excellent guide took us on a bus and walking tour of Quito’s old town. This started with the Basilica del Voto Nacional, where everyone marvelled at the “grotesques” of native Ecuadorian animals such as frigatebirds, iguanas and tortoises. -
Estimations Relative to Birds of Prey in Captivity in the United States of America
ESTIMATIONS RELATIVE TO BIRDS OF PREY IN CAPTIVITY IN THE UNITED STATES OF AMERICA by Roger Thacker Department of Animal Laboratories The Ohio State University Columbus, Ohio 43210 Introduction. Counts relating to birds of prey in captivity have been accomplished in some European countries; how- ever, to the knowledge of this author no such information is available in the United States of America. The following paper consistsof data related to this subject collected during 1969-1970 from surveys carried out in many different direc- tions within this country. Methods. In an attempt to obtain as clear a picture as pos- sible, counts were divided into specific areas: Research, Zoo- logical, Falconry, and Pet Holders. It became obvious as the project advanced that in some casesthere was overlap from one area to another; an example of this being a falconer working with a bird both for falconry and research purposes. In some instances such as this, the author has used his own judgment in placing birds in specific categories; in other in- stances received information has been used for this purpose. It has also become clear during this project that a count of "pets" is very difficult to obtain. Lack of interest, non-coop- eration, or no available information from animal sales firms makes the task very difficult, as unfortunately, to obtain a clear dispersal picture it is from such sourcesthat informa- tion must be gleaned. However, data related to the importa- tion of birds' of prey as recorded by the Bureau of Sport Fisheries and Wildlife is included, and it is felt some observa- tions can be made from these figures. -
Raptor Migration in the Neotropics: Patterns, Processes, and Consequences
ORNITOLOGIA NEOTROPICAL 15 (Suppl.): 83–99, 2004 © The Neotropical Ornithological Society RAPTOR MIGRATION IN THE NEOTROPICS: PATTERNS, PROCESSES, AND CONSEQUENCES Keith L. Bildstein Hawk Mountain Sanctuary Acopian Center, 410 Summer Valley Road, Orwigsburg, Pennsylvania 17961, USA. E-mail: [email protected] Resumen. – Migración de rapaces en el Neotrópico: patrones, procesos y consecuencias. – El Neotró- pico alberga poblaciones reproductivas y no reproductivas de 104 de las 109 especies de rapaces del Nuevo Mundo (i.e., miembros del suborden Falconides y de la subfamilia Cathartinae), incluyendo 4 migrantes obligatorios, 36 migrantes parciales, 28 migrantes irregulares o locales, y 36 especies que se presume que no migran. Conteos estandarizados de migración visible iniciados en la década de los 1990, junto con una recopilación de literatura, nos proveen con una idea general de la migración de rapaces en la región. Aquí describo los movimientos de las principales especies migratorias y detallo la geografía de la migración en el Neotrópico. El Corredor Terrestre Mesoamericano es la ruta de migración mas utilizada en la región. Tres especies que se reproducen en el Neártico, el Elanio Colinegro (Ictina mississippiensis), el Gavilán Aludo (Buteo platypterus) y el Gavilán de Swainson (B. swainsoni), de los cuales todos son migrantes obligatorios, junto con las poblaciones norteamericanas del Zopilote Cabecirrojo (Cathartes aura), dominan numérica- mente este vuelo norteño o “boreal”. Cantidades mucho menores de Aguilas Pescadoras (Pandion haliaetus), Elanios Tijereta (Elanoides forficatus), Esmerejónes (Falco columbarius) y Halcones Peregrinos (Falco peregrinus), ingresan y abandonan el Neotrópico rutinariamente utilizando rutas que atraviesan el Mar Caribe y el Golfo de México. Los movimientos sureños o “australes” e intra-tropicales, incluyendo la dispersión y la colonización en respuesta a cambios en el hábitat, son conocidos pero permanecen relativamente poco estudiados. -
Eagle-Eye Tours BIRD CHECKLIST
BIRD CHECKLIST Leader: Paul Prior Eagle-Eye Tours Guyana January 2016 BIRD SPECIES Common Name Scientific Name Seen/Heard TINAMOUS 1 Great Tinamou Tinamus major S 2 Cinereous Tinamou Crypturellus cinereus H 3 Undulated Tinamou Crypturellus undulatus S 4 Red-legged Tinamou Crypturellus erythropus H 5 Variegated Tinamou Crypturellus variegatus H DUCKS, GEESE, AND WATERFOWL 6 White-faced Whistling-DuckDendrocygna viduata S 7 Muscovy Duck Cairina moschata S GUANS, CHACHALACAS, AND CURASSOWS 8 Variable Chachalaca Ortalis motmot S 9 Spix's Guan Penelope jacquacu S 10 Black Curassow Crax alector S NEW WORLD QUAIL 11 Crested Bobwhite Colinus cristatus S 12 Marbled Wood-Quail Odontophorus gujanensis H STORKS 13 Maguari Stork Ciconia maguari S 14 Jabiru Jabiru mycteria S CORMORANTS AND SHAGS 15 Neotropic Cormorant Phalacrocorax brasilianus S ANHINGAS 16 Anhinga Anhinga anhinga S PELICANS 17 Brown Pelican Pelecanus occidentalis S HERONS, EGRETS, AND BITTERNS 18 Rufescent Tiger-Heron Tigrisoma lineatum S 19 Pinnated Bittern Botaurus pinnatus S 20 Cocoi Heron Ardea cocoi S 21 Great Egret Ardea alba S 22 Snowy Egret Egretta thula S 23 Little Blue Heron Egretta caerulea S 24 Tricolored Heron Egretta tricolor S 25 Cattle Egret Bubulcus ibis S 26 Striated Heron Butorides striata S 27 Capped Heron Pilherodius pileatus S 28 Yellow-crowned Night-HeronNyctanassa violacea S 29 Boat-billed Heron Cochlearius cochlearius S IBISES AND SPOONBILLS 30 Scarlet Ibis Eudocimus ruber S 31 Green Ibis Mesembrinibis cayennensis S 32 Buff-necked Ibis Theristicus caudatus -
The Conservation Status of Raptors in Chile
Birds of Prey Bull. No. 3 (1986) The Conservation Status of Raptors in Chile Fabian M. Jaksic&Jaime E. Jimenez INTRODUCTION Information about raptors in Chile is found primarily in general works on the taxonomy, distribution and biology of Chilean birds or as part of studies (mainly systematic) that include Chilean specimens. Miscellaneous notes on the biology of selected raptor species usually provide some information on their food and habitat preferences and a few accounts for particular localities mention the presence, breeding and comparative abundance of raptors. Information on their habitat requirements is scarce and primarily qualitative. No doubt the best quantitative information comes from studies of their diet, which concentrate on central Chile. A few other dietary studies deal with raptor populations in the southern parts of the country. In short, the conservation status of Chilean raptors has scarcely been addressed, except for the necessarily brief treatment provided by Fottmann and Benoit (1983). In the following pages we present and discuss current knowledge pertaining to raptor conservation in Chile. METHODS We have reviewed all the published accounts which contain information on the status of raptors in Chile, augmented by verbal communications from competent wildlife biologists and our personal observations. For the purpose of our analysis, we have divided Chile into four regions, which roughly correspond with recognized vegetational and climatic units. Region 1: Northern Chile, from Arica to Copiapo; mainly warm desert areas, including oases and puna. Region 2: Central Chile, from Copiapo to Concepcion; mainly warm shrubland areas. Region 3: Southern Chile, from Ooncepcion to Quellon in Chiloe Island; mainly temperate forest areas. -
Comparative Phylogeography and Population Genetics Within Buteo Lineatus Reveals Evidence of Distinct Evolutionary Lineages
Molecular Phylogenetics and Evolution 49 (2008) 988–996 Contents lists available at ScienceDirect Molecular Phylogenetics and Evolution journal homepage: www.elsevier.com/locate/ympev Comparative phylogeography and population genetics within Buteo lineatus reveals evidence of distinct evolutionary lineages Joshua M. Hull a,*, Bradley N. Strobel b, Clint W. Boal b, Angus C. Hull c, Cheryl R. Dykstra d, Amanda M. Irish a, Allen M. Fish c, Holly B. Ernest a,e a Wildlife and Ecology Unit, Veterinary Genetics Laboratory, 258 CCAH, University of California, One Shields Avenue, Davis, CA 95616, USA b U.S. Geological Survey Texas Cooperative Fish and Wildlife Research Unit, Department of Natural Resources Management, Texas Tech University, Lubbock, TX 79409, USA c Golden Gate Raptor Observatory, Building 1064 Fort Cronkhite, Sausalito, CA 94965, USA d Raptor Environmental, 7280 Susan Springs Drive, West Chester, OH 45069, USA e Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, One Shields Avenue/Old Davis Road, Davis, CA 95616, USA article info abstract Article history: Traditional subspecies classifications may suggest phylogenetic relationships that are discordant with Received 25 June 2008 evolutionary history and mislead evolutionary inference. To more accurately describe evolutionary rela- Revised 13 September 2008 tionships and inform conservation efforts, we investigated the genetic relationships and demographic Accepted 17 September 2008 histories of Buteo lineatus subspecies in eastern and western North America using 21 nuclear microsatel- Available online 26 September 2008 lite loci and 375-base pairs of mitochondrial control region sequence. Frequency based analyses of mito- chondrial sequence data support significant population distinction between eastern (B. -
Breeding Biology of Neotropical Accipitriformes: Current Knowledge and Research Priorities
Revista Brasileira de Ornitologia 26(2): 151–186. ARTICLE June 2018 Breeding biology of Neotropical Accipitriformes: current knowledge and research priorities Julio Amaro Betto Monsalvo1,3, Neander Marcel Heming2 & Miguel Ângelo Marini2 1 Programa de Pós-graduação em Ecologia, IB, Universidade de Brasília, Brasília, DF, Brazil. 2 Departamento de Zoologia, IB, Universidade de Brasília, Brasília, DF, Brazil. 3 Corresponding author: [email protected] Received on 08 March 2018. Accepted on 20 July 2018. ABSTRACT: Despite the key role that knowledge on breeding biology of Accipitriformes plays in their management and conservation, survey of the state-of-the-art and of information gaps spanning the entire Neotropics has not been done since 1995. We provide an updated classification of current knowledge about breeding biology of Neotropical Accipitridae and define the taxa that should be prioritized by future studies. We analyzed 440 publications produced since 1995 that reported breeding of 56 species. There is a persistent scarcity, or complete absence, of information about the nests of eight species, and about breeding behavior of another ten. Among these species, the largest gap of breeding data refers to the former “Leucopternis” hawks. Although 66% of the 56 evaluated species had some improvement on knowledge about their breeding traits, research still focus disproportionately on a few regions and species, and the scarcity of breeding data on many South American Accipitridae persists. We noted that analysis of records from both a citizen science digital database and museum egg collections significantly increased breeding information on some species, relative to recent literature. We created four groups of priority species for breeding biology studies, based on knowledge gaps and threat categories at global level. -
Species List – November 10 -17, 2019 with Mainland Ecuador Puembo/Antisana National Park Pre-Extension November 9, 2019
Journey to the Galapagos Species List – November 10 -17, 2019 With mainland Ecuador Puembo/Antisana National Park pre-extension November 9, 2019 Guide Dan Donaldson, with local guides Antonio and Gustavo (in Galapagos), and 19 participants: Becky, Tom and Nancy, Julianne, Cynthia, John and Kathy L, Kathy P, Ed and Sil, Jenise, Ram and Sudha, Jim and Brenda, Kitty, Jean, Carol, and Deb. GALAPAGOS ISLANDS (HO)= Distinctive enough to be counted as heard only (E)= Galapagos Endemic (I)=introduced BIRDS (45 species recorded, of which 0 were heard only): DUCKS, GEESE, AND SWANS: Anatidae (1) White-cheeked Pintail Anas bahamensis— Several seen on Punta Cormorant Pond on Floreana with American Flamingos and again on Santa Cruz at El Chato Ranch (Giant Tortoise Ranch) FLAMINGOS: Phoenicopteridae (1) American Flamingo Phoenicopterus ruber— 37, Small groups, viewed from across the pond, making up 37 or more individuals seen at Punta Cormorant. Early breeding displays by several individuals consisting of coordinated marching and wing extensions were observed. PIGEONS AND DOVES: Columbidae (1) Galapagos Dove Zenaida galapagoensis (E)— 8, Observed on several days including on the beach at Punta Pitt and again on the hike at Punta Suarez. CUCKOOS: Cuculidae (1) Smooth-billed Ani Crotophaga ani (I)— 13, First seen on the drive into El Chato Ranch to view the giant tortoises, this species was introduced to the Galapagos to preen ticks from cattle. Their effectiveness at this task is questionable. STILTS AND AVOCETS: Recurvirostridae (1) Black-necked Stilt Himantopus mexicanus— 1, This individual was spotted feeding in a small mangrove cove on Punta Cormorant Pond. -
Observations on the Comparative Behavioral Ecology of Harris' Hawk in Central Chile
j. Raptor Res. 27(3):143-148 ¸ 1993 The Raptor ResearchFoundation, Inc. OBSERVATIONS ON THE COMPARATIVE BEHAVIORAL ECOLOGY OF HARRIS' HAWK IN CENTRAL CHILE JAIME E. JIMgNEZ• Departmentof Wildlifeand RangeSciences, University of Florida, Gainesville, FL 32611 U.S.A. FABIANM. JAKSI• Departamentode Ecologfa,Universidad Catdlica de Chile,Casilla I Id-D, Santiago,Chile ABsTR•CT.--Throughoutone year we observedthe behavioralecology of Harris' Hawks (Parabuteo unicinctus)in central Chile. The hawks' activity period lacked diel or annual variation. Their most commonflight modewas soaringin thermalsand wind updrafts,rarely usingflapping flight, and never hovering.Harris' Hawks appearedto selectphysiographic features that favoredthe presenceof updrafts, particularlynorth- and west-facing slopes and ridgetops, but werealso commonly seen flying over ravines (wherethey perched frequently). Prey were primarily small- and medium-sized mammals, and secondarily medium-sizedbirds. Although not aggressive,Harris' Hawks were nonethelessattacked by two other sympatricraptors, Black-chested Eagles (Geranoaetus melanoleucus) and Red-backedHawks (Buteopo- lyosoma).These three species,which were studiedover the sameperiod and with the sametechniques, were similar in activityand behavior,although Harris' Hawks were slightlymore differentthan the latter were between themselves. Observacionessobre la ecologiaconductual comparativa de peucosen Chile central RESUMEN.--Porun afio observamosla ecologiaconductual del peuco(Parabuteo unicinctus) en Chile central.E1 periodode -
Variation in Morphology and Mating System Among Island Populations of Gala´ Pagos Hawks
The Condor 105:428±438 q The Cooper Ornithological Society 2003 VARIATION IN MORPHOLOGY AND MATING SYSTEM AMONG ISLAND POPULATIONS OF GALAÂ PAGOS HAWKS JENNIFER L. BOLLMER1,5,6,TANIA SANCHEZ2,MICHELLE DONAGHY CANNON3,7, DIDIER SANCHEZ2,BRIAN CANNON3,8,JAMES C. BEDNARZ3,TJITTE DE VRIES2, M. SUSANA STRUVE4,9 AND PATRICIA G. PARKER1,6 1Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, 1735 Neil Avenue, Columbus, OH 43210 and Department of Biology, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, MO 63121 2Departamento de BiologõÂa, PontifõÂcia Universidad CatoÂlica del Ecuador, Quito, Ecuador 3Department of Biological Sciences, Arkansas State University, P.O. Box 599, State University, AR 72467 4Charles Darwin Foundation, Inc., 407 N. Washington Street, Suite 105, Falls Church, VA 22046 Abstract. Interspeci®c variation in sexual size dimorphism has commonly been attributed to variation in social mating system, with dimorphism increasing as intrasexual competition for mates increases. In birds, overall body size has also been found to correlate positively with size dimorphism. In this study, we describe variation in morphology and mating system across six populations of the endemic GalaÂpagos Hawk (Buteo galapagoensis). GalaÂpagos Hawks exhibit cooperative polyandry, a mating system in which long-term social groups contain a single female and multiple males. Comparisons among islands revealed signi®cant differences in overall body size for both adults and immatures. Populations ranged from completely monogamous to completely polyandrous, with varying mean group sizes. Data did not support our prediction that sexual size dimorphism would increase with the degree of polyandry (number of males per group) or with body size; there was no correlation between mating system and sexual dimorphism. -
PERU: Manu and Machu Picchu Aug-Sept
Tropical Birding Trip Report PERU: Manu and Machu Picchu Aug-Sept. 2015 A Tropical Birding SET DEPARTURE tour PERU: MANU and MACHU PICCHU th th 29 August – 16 September 2015 Tour Leader: Jose Illanes Andean Cock-of-the-rock near Cock-of-the-rock Lodge! Species highlighted in RED are the ones illustrated with photos in this report. INTRODUCTION Not everyone is fortunate enough to visit Peru; a marvelous country that boasts a huge country bird list, which is second only to Colombia. Unlike our usual set departure, we started out with a daylong extension to Lomas de Lachay first, before starting out on the usual itinerary for the main tour. On this extra day we managed to 1 www.tropicalbirding.com +1-409-515-0514 [email protected] Page Tropical Birding Trip Report PERU: Manu and Machu Picchu Aug-Sept. 2015 find many extra birds like Peruvian Thick-knee, Least Seedsnipe, Peruvian Sheartail, Raimondi’s Yellow- Finch and the localized Cactus Canastero. The first site of the main tour was Huacarpay Lake, near the beautiful Andean city of Cusco (accessed after a short flight from Lima). This gave us a few endemic species like Bearded Mountaineer and Rusty-fronted Canastero; along with other less local species like Many-colored Rush-tyrant, Plumbeous Rail, Puna Teal, Andean Negrito and Puna Ibis. The following day we birded along the road towards Manu where we picked up birds like Peruvian Sierra-Finch, Chestnut-breasted Mountain-Finch, Spot-winged Pigeon, and a beautiful Peruvian endemic in the form of Creamy-crested Spinetail. We also saw Yungas Pygmy-Owl, Black-faced Ibis, Hooded and Scarlet-bellied Mountain- Tanagers, Red-crested Cotinga and the gorgeous Grass-green Tanager.