December 2011 Is Our Annual Christmas Bird Count
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Predation by Gray Catbird on Brown Thrasher Eggs
March 2004 Notes 101 PREDATION BY GRAY CATBIRD ON BROWN THRASHER EGGS JAMES W. RIVERS* AND BRETT K. SANDERCOCK Kansas Cooperative Fish and Wildlife Research Unit, Division of Biology, Kansas State University, Manhattan, KS 66506 (JWR) Division of Biology, Kansas State University, Manhattan, KS 66506 (BKS) Present address of JWR: Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106 *Correspondent: [email protected] ABSTRACT The gray catbird (Dumetella carolinensis) has been documented visiting and breaking the eggs of arti®cial nests, but the implications of such observations are unclear because there is little cost in depredating an undefended nest. During the summer of 2001 at Konza Prairie Bio- logical Station, Kansas, we videotaped a gray catbird that broke and consumed at least 1 egg in a brown thrasher (Toxostoma rufum) nest. Our observation was consistent with egg predation because the catbird consumed the contents of the damaged egg after breaking it. The large difference in body mass suggests that a catbird (37 g) destroying eggs in a thrasher (69 g) nest might risk injury if caught in the act of predation and might explain why egg predation by catbirds has been poorly documented. Our observation indicated that the catbird should be considered as an egg predator of natural nests and that single-egg predation of songbird nests should not be attributed to egg removal by female brown-headed cowbirds (Molothrus ater) without additional evidence. RESUMEN El paÂjaro gato gris (Dumetella carolinensis) ha sido documentado visitando y rompien- do los huevos de nidos arti®ciales, pero las implicaciones de dichas observaciones no son claras porque hay poco costo por depredar un nido sin defensa. -
Flyer200206 Parent
THE, FLYE, R Volume 26,25, NumberNumber 6 6 tuneJune 20022002 NEXT MEETING After scientists declared the Gunnison Sage Grouse a new species two years ago, a wide spot on Gun- Summer is here and we won't have meeting until a nison County (Colorado) Road 887, has become an Wednesday, 18. It begin September will atl:30 international bird-watching sensation. Birders from p.m. in Room 117 Millington Hall, on the William around the ,world wait silently in the cold dark of a campus. The editors'also get a summer &Mary Colorado spring pre-dawn to hear the "Thwoomp! vacation so there will be no July Flyer, but "God Thwoomp! Thwoomp!" of a male Gunnison Sage the creek rise," there be an willing and if don't will Grouse preparing to mate. The noise comes from August issue. specialized air sacs on the bird's chest. And this is now one stop on a well-traveled 1,000 mile circuit being traveled by birders wanting to add this Gun- RAIN CURTAILS FIELD TRIP TO nison bird, plus the Chukar, the Greater Sage YORK RIVER STATE PARK Grouse, the White-tailed Ptarmigan, the Greater Chicken Skies were threatening and the wind was fierce at Prairie and the Lesser Prairie Chicken to the beginning of the trip to the York River State their lii'e lists. Park on May 18. Despite all of that, leader Tom It was not always like this. Prior to the two-year- Armour found some very nice birds before the rains ago decision by the Ornithological Union that this came flooding down. -
Salt Exploitation and Landscape Structure in a Breeding Population of the Threatened Bluethroat (Luscinia Svecica) in Salt-Pans in Western France
Biological Conservation 107 (2002) 283–289 www.elsevier.com/locate/biocon Salt exploitation and landscape structure in a breeding population of the threatened bluethroat (Luscinia svecica) in salt-pans in western France T. Geslina,*, J.-C. Lefeuvrea, Y. Le Pajoleca, S. Questiaub, M.C. Eyberta aUMR 6553 ECOBIO, Universite´ de Rennes I, Avenue du Ge´ne´ral Leclerc, 35042 Rennes cedex, France bLaboratoire d’Ecologie animale, Universite´ d’Angers, 2 Boulevard Lavoisier, Campus Belle-Beille, 49045 Angers cedex, France Received 12 June 2001; received in revised form 10 January 2002; accepted 10 January 2002 Abstract The Gue´ rande salt-pans represent the main French breeding area of bluethroat, a migrating passerine. Salt exploitation has cre- ated a geometrical artificial landscape in which we investigated factors influencing spatial distribution and breeding success of this species using a Geographical Information System. We compared data for four sites in these salt-pans, for three zones in the most densely populated site, and for 2500 m2 grid cells defined for this same site. This study showed the influence of (1) the level of salt exploitation activity, (2) the density of bank intersections, (3) the extent of area covered by Suaeda vera bushes and (4) the structural heterogeneity. The continued management of these salt-pans enhanced bird breeding success. Thus, traditional salt exploitation contributes directly to the conservation of bluethroat, considered as an endangered species in Europe. # 2002 Elsevier Science Ltd. All rights reserved. Keywords: Breeding bluethroat; Human activity; Salt-pans area; Landscape heterogeneity; Breeding success 1. Introduction throats. Then, bluethroats decreased and finally dis- appeared with decline of salt extraction and use of The bluethroat (Luscinia svecica) is a migrating pas- banks for crops and pasture. -
Catbird, Gray
Mockingbirds and Thrashers — Family Mimidae 449 Mockingbirds and Thrashers — Family Mimidae Gray Catbird Dumetella carolinensis Though the Gray Catbird breeds west almost to the coast of British Columbia, it is only a rare vagrant to California—the bulk of the population migrates east of the Rocky Mountains. But the species is on the increase: of 107 reports accepted by the California Bird Records Committee 1884–1999, one third were in just the last four years of this interval. Similarly, of the 20 records of the Gray Catbird in San Diego County, 10 have come since initiation of the field work for this atlas in 1997. Migration: Half of San Diego County’s known cat- Photo by Anthony Mercieca birds have been fall migrants, occurring as early as 24 September (1976, one at Point Loma, S7, K. van Vuren, Cabrillo National Monument, Point Loma 11–17 July 1988 Luther et al. 1979). Besides eight fall records from Point (B. and I. Mazin, Pyle and McCaskie 1992) certainly was. Loma, there is one from the Tijuana River valley 7–8 November 1964 (the only specimen, SDNHM 35095), Winter: Three wintering Gray Catbirds have been report- one from a boat 15 miles off Oceanside 26 October 1983 ed from San Diego County, from Balboa Park (R9) (M. W. Guest, Bevier 1990), and two from Paso Picacho 16 December 1972 (P. Unitt) and from Point Loma 7 Campground (M20) 29 October 1988 (D. W. Aguillard, November 1983–13 March 1984 (V. P. Johnson, Roberson Pyle and McCaskie 1992) and 17 November 2002 (T. 1986) and 31 October 1999–21 January 2000 (D. -
Does a Rival's Song Elicit Territorial Defense in a Tropical Songbird, The
ABC 2017, 4(2):146-153 Animal Behavior and Cognition https://doi.org/10.12966/abc.02.05.2017 ©Attribution 3.0 Unported (CC BY 3.0) Does a Rival’s Song Elicit Territorial Defense in a Tropical Songbird, the Pied Bush Chat (Saxicola caprata)? Navjeevan Dadwal1* and Dinesh Bhatt1 1Gurukula Kangri University, Haridwar, Uttarakhand, India *Corresponding author (Email:[email protected]) Citation – Dadwal, N., & Bhatt, D. (2017). Does a rival’s song elicit territorial defense in a tropical songbird, the Pied Bush Chat (Saxicola caprata)? Animal Behavior and Cognition, 4(2), 146–153. https://doi.org/10.12966/ abc.02.05.2017 Abstract -The purpose of bird song and the way in which it is delivered has been argued to be adapted mainly for territorial defense. We performed a field experiment with the combination of playbacks and a model to test how much song actually relates to increased territorial defense in the territorial tropical songbird, the Pied Bush Chat, during breeding season (Feb–May, 2015) at Haridwar, Himalayan Foothills, India. As expected, the results of the experiment indicated that song was the major cue used by territory holders to cope with rival intrusions. The song rate was particularly escalated during simulated territorial interactions when the model was presented with a playback song of conspecifics. Behaviors such as restlessness (perch change), the height of perch, and distance from the model appeared to be of relatively lesser importance. To our knowledge, no avian species from the Indian subcontinent has been studied to provide evidence that song can escalate aggressive response by a territory owner. -
American Robin
American Robin DuPage Birding Club, 2020 American Robin Appearance A chunky, heavy-bodied bird with a relatively small dark head. Sexually dimorphic, meaning the male and female look different. American Robins are a uniform dark gray with a brick red breast. Female Male Females are a lighter gray with a lighter breast. Males tend to be darker with a brighter red breast. Males are larger than females. Photos: Elmarie Von Rooyen (left), Jackie Tilles (right) DuPage Birding Club, 2020 2 American Robin Appearance American Robins are a medium-size bird with a length of about ten inches. They are so common that they are a good bird to compare size with when you come across an unknown bird. Is the bird bigger than an American Robin or smaller than an American Robin? Judging the size of a bird is very helpful in identifying an unknown bird. Chart: The Cornell Lab, All About Birds https://www.allaboutbirds.org/guide/American_Robin/id DuPage Birding Club, 2020 3 American Robin Appearance Juvenile American Robins have a speckled breast with a tint of rusty red. Photos: Natalie McFaul DuPage Birding Club, 2020 4 American Robin Sounds From The Cornell Lab of Ornithology: https://www.birds.cornell.edu/home/ SONGS The musical song of the American Robin is a familiar sound of spring. It’s a string of 10 or so clear whistles assembled from a few often- repeated syllables, and often described as cheerily, cheer up, cheer up, cheerily, cheer up. The syllables rise and fall in pitch but are delivered at a steady rhythm, with a pause before the bird begins singing again. -
Timing Manipulations Reveal the Lack of a Causal Link Across Timing of Annual-Cycle Stages in a Long-Distance Migrant Barbara M
© 2019. Published by The Company of Biologists Ltd | Journal of Experimental Biology (2019) 222, jeb201467. doi:10.1242/jeb.201467 RESEARCH ARTICLE Timing manipulations reveal the lack of a causal link across timing of annual-cycle stages in a long-distance migrant Barbara M. Tomotani1,2,*, Iván de la Hera1,3, Cynthia Y. M. J. G. Lange1, Bart van Lith1, Simone L. Meddle4, Christiaan Both5 and Marcel E. Visser1,5 ABSTRACT and Wingfield, 2000; Wingfield, 2008). Annual cycles vary in Organisms need to time their annual-cycle stages, like breeding and complexity in a species-specific way: from simple breeding/non- migration, to occur at the right time of the year. Climate change has breeding transitions to the inclusion of other energetically demanding shifted the timing of annual-cycle stages at different rates, thereby stages like migration or moult (Wingfield, 2008). As the total time tightening or lifting time constraints of these annual-cycle stages, a available for the allocation of these seasonal stages is 1 year, more rarely studied consequence of climate change. The degree to which complex annual cycles will necessarily involve a concomitant increase these constraints are affected by climate change depends on whether in time constraints. This is especially true if these different stages are consecutive stages are causally linked (scenario I) or whether the all energetically demanding and need to be temporally segregated timing of each stage is independent of other stages (scenario II). (Dietz et al., 2013). Complex annual cycles would thus result in low Under scenario I, a change in timing in one stage has knock-on timing flexibility as further shortening or overlapping stages would lead to effects on subsequent stages, whereas under scenario II, a shift in the fitness costs (Jacobs and Wingfield, 2000; Wingfield, 2008). -
A Complete Species-Level Molecular Phylogeny For
Author's personal copy Available online at www.sciencedirect.com Molecular Phylogenetics and Evolution 47 (2008) 251–260 www.elsevier.com/locate/ympev A complete species-level molecular phylogeny for the ‘‘Eurasian” starlings (Sturnidae: Sturnus, Acridotheres, and allies): Recent diversification in a highly social and dispersive avian group Irby J. Lovette a,*, Brynn V. McCleery a, Amanda L. Talaba a, Dustin R. Rubenstein a,b,c a Fuller Evolutionary Biology Program, Laboratory of Ornithology, Cornell University, Ithaca, NY 14950, USA b Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14850, USA c Department of Integrative Biology and Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720, USA Received 2 August 2007; revised 17 January 2008; accepted 22 January 2008 Available online 31 January 2008 Abstract We generated the first complete phylogeny of extant taxa in a well-defined clade of 26 starling species that is collectively distributed across Eurasia, and which has one species endemic to sub-Saharan Africa. Two species in this group—the European starling Sturnus vulgaris and the common Myna Acridotheres tristis—now occur on continents and islands around the world following human-mediated introductions, and the entire clade is generally notable for being highly social and dispersive, as most of its species breed colonially or move in large flocks as they track ephemeral insect or plant resources, and for associating with humans in urban or agricultural land- scapes. Our reconstructions were based on substantial mtDNA (4 kb) and nuclear intron (4 loci, 3 kb total) sequences from 16 species, augmented by mtDNA NDII gene sequences (1 kb) for the remaining 10 taxa for which DNAs were available only from museum skin samples. -
The All-Bird Bulletin
Advancing Integrated Bird Conservation in North America Spring 2014 Inside this issue: The All-Bird Bulletin Protecting Habitat for 4 the Buff-breasted Sandpiper in Bolivia The Neotropical Migratory Bird Conservation Conserving the “Jewels 6 Act (NMBCA): Thirteen Years of Hemispheric in the Crown” for Neotropical Migrants Bird Conservation Guy Foulks, Program Coordinator, Division of Bird Habitat Conservation, U.S. Fish and Bird Conservation in 8 Wildlife Service (USFWS) Costa Rica’s Agricultural Matrix In 2000, responding to alarming declines in many Neotropical migratory bird popu- Uruguayan Rice Fields 10 lations due to habitat loss and degradation, Congress passed the Neotropical Migra- as Wintering Habitat for tory Bird Conservation Act (NMBCA). The legislation created a unique funding Neotropical Shorebirds source to foster the cooperative conservation needed to sustain these species through all stages of their life cycles, which occur throughout the Western Hemi- Conserving Antigua’s 12 sphere. Since its first year of appropriations in 2002, the NMBCA has become in- Most Critical Bird strumental to migratory bird conservation Habitat in the Americas. Neotropical Migratory 14 Bird Conservation in the The mission of the North American Bird Heart of South America Conservation Initiative is to ensure that populations and habitats of North Ameri- Aros/Yaqui River Habi- 16 ca's birds are protected, restored, and en- tat Conservation hanced through coordinated efforts at in- ternational, national, regional, and local Strategic Conservation 18 levels, guided by sound science and effec- in the Appalachians of tive management. The NMBCA’s mission Southern Quebec is to achieve just this for over 380 Neo- tropical migratory bird species by provid- ...and more! Cerulean Warbler, a Neotropical migrant, is a ing conservation support within and be- USFWS Bird of Conservation Concern and listed as yond North America—to Latin America Vulnerable on the International Union for Conser- Coordination and editorial vation of Nature (IUCN) Red List. -
Tinamiformes – Falconiformes
LIST OF THE 2,008 BIRD SPECIES (WITH SCIENTIFIC AND ENGLISH NAMES) KNOWN FROM THE A.O.U. CHECK-LIST AREA. Notes: "(A)" = accidental/casualin A.O.U. area; "(H)" -- recordedin A.O.U. area only from Hawaii; "(I)" = introducedinto A.O.U. area; "(N)" = has not bred in A.O.U. area but occursregularly as nonbreedingvisitor; "?" precedingname = extinct. TINAMIFORMES TINAMIDAE Tinamus major Great Tinamou. Nothocercusbonapartei Highland Tinamou. Crypturellus soui Little Tinamou. Crypturelluscinnamomeus Thicket Tinamou. Crypturellusboucardi Slaty-breastedTinamou. Crypturellus kerriae Choco Tinamou. GAVIIFORMES GAVIIDAE Gavia stellata Red-throated Loon. Gavia arctica Arctic Loon. Gavia pacifica Pacific Loon. Gavia immer Common Loon. Gavia adamsii Yellow-billed Loon. PODICIPEDIFORMES PODICIPEDIDAE Tachybaptusdominicus Least Grebe. Podilymbuspodiceps Pied-billed Grebe. ?Podilymbusgigas Atitlan Grebe. Podicepsauritus Horned Grebe. Podicepsgrisegena Red-neckedGrebe. Podicepsnigricollis Eared Grebe. Aechmophorusoccidentalis Western Grebe. Aechmophorusclarkii Clark's Grebe. PROCELLARIIFORMES DIOMEDEIDAE Thalassarchechlororhynchos Yellow-nosed Albatross. (A) Thalassarchecauta Shy Albatross.(A) Thalassarchemelanophris Black-browed Albatross. (A) Phoebetriapalpebrata Light-mantled Albatross. (A) Diomedea exulans WanderingAlbatross. (A) Phoebastriaimmutabilis Laysan Albatross. Phoebastrianigripes Black-lootedAlbatross. Phoebastriaalbatrus Short-tailedAlbatross. (N) PROCELLARIIDAE Fulmarus glacialis Northern Fulmar. Pterodroma neglecta KermadecPetrel. (A) Pterodroma -
Thailand Highlights 14Th to 26Th November 2019 (13 Days)
Thailand Highlights 14th to 26th November 2019 (13 days) Trip Report Siamese Fireback by Forrest Rowland Trip report compiled by Tour Leader: Forrest Rowland Trip Report – RBL Thailand - Highlights 2019 2 Tour Summary Thailand has been known as a top tourist destination for quite some time. Foreigners and Ex-pats flock there for the beautiful scenery, great infrastructure, and delicious cuisine among other cultural aspects. For birders, it has recently caught up to big names like Borneo and Malaysia, in terms of respect for the avian delights it holds for visitors. Our twelve-day Highlights Tour to Thailand set out to sample a bit of the best of every major habitat type in the country, with a slight focus on the lush montane forests that hold most of the country’s specialty bird species. The tour began in Bangkok, a bustling metropolis of winding narrow roads, flyovers, towering apartment buildings, and seemingly endless people. Despite the density and throng of humanity, many of the participants on the tour were able to enjoy a Crested Goshawk flight by Forrest Rowland lovely day’s visit to the Grand Palace and historic center of Bangkok, including a fun boat ride passing by several temples. A few early arrivals also had time to bird some of the urban park settings, even picking up a species or two we did not see on the Main Tour. For most, the tour began in earnest on November 15th, with our day tour of the salt pans, mudflats, wetlands, and mangroves of the famed Pak Thale Shore bird Project, and Laem Phak Bia mangroves. -
Papua New Guinea
Papua New Guinea Naturetrek Tour Report 14th August - 2nd September 2005 Report compiled by Jon Hornbuckle Naturetrek Cheriton Mill Cheriton Alresford Hampshire SO24 0NG England T: +44 (0)1962 733051 F: +44 (0)1962 736426 E: [email protected] W: www.naturetrek.co.uk Tour Report Papua New Guinea Tour Leader Jon Hornbuckle Tour participants Malc Quirie Edinburgh Issy Quirie Edinburgh Stef McLaney Suffolk John Tomkins Herts Norman Dannatt Cambs Janie Vaughan South Australia Gillian Vaughan New Zealand Magnus Jäderblad Sweden On this year’s tour of Papua New Guinea, we succeeded in seeing 21 species of the unique Birds of Paradise, along with a variety of kingfishers, parrots, pigeons, bowerbirds, whistlers and honeyeaters. Highlights included displaying King of Saxony, Twelve-wired, Superb and King Birds of Paradise, a beautiful Brown-headed Paradise-Kingfisher singing his heart out, and a rarely seen Dorias Hawk. Add to these Brown Sicklebill, Ribbon- tailed and Stephanie’s Astrapias, and an impressive collection of New Guinea’s endemic birds, such as Brehm’s, Painted and Modest Tiger-Parrots, Blue-capped Ifrita, Obscure and Crested Berrypeckers, Salvadori’s Teal, and Wallace’s Fairy-Wren, and you can see why this tour was a success. After a chaotic check-in at Heathrow’s Terminal 4, during which BA lost my checked-in bag, five of us collected free sandwiches and bottled water to tide us over on the food-free BA flight to Singapore. At Changi airport the following evening, we met Malc and Issy who arrived an hour later on BA’s second flight of the night from Heathrow.