Tour Report 30 April – 6 May 2014
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Host Alarm Calls Attract the Unwanted Attention of the Brood Parasitic
www.nature.com/scientificreports OPEN Host alarm calls attract the unwanted attention of the brood parasitic common cuckoo Attila Marton 1,2*, Attila Fülöp 2,3, Katalin Ozogány1, Csaba Moskát 4,5 & Miklós Bán 1,3,5 It is well known that avian brood parasites lay their eggs in the nests of other bird species, called hosts. It remains less clear, however, just how parasites are able to recognize their hosts and identify the exact location of the appropriate nests to lay their eggs in. While previous studies attributed high importance to visual signals in fnding the hosts’ nests (e.g. nest building activity or the distance and direct sight of the nest from vantage points used by the brood parasites), the role of host acoustic signals during the nest searching stage has been largely neglected. We present experimental evidence that both female and male common cuckoos Cuculus canorus pay attention to their host’s, the great reed warbler’s Acrocephalus arundinaceus alarm calls, relative to the calls of an unparasitized species used as controls. Parallel to this, we found no diference between the visibility of parasitized and unparasitized nests during drone fights, but great reed warblers that alarmed more frequently experienced higher rates of parasitism. We conclude that alarm calls might be advantageous for the hosts when used against enemies or for alerting conspecifcs, but can act in a detrimental manner by providing important nest location cues for eavesdropping brood parasites. Our results suggest that host alarm calls may constitute a suitable trait on which cuckoo nestlings can imprint on to recognize their primary host species later in life. -
British Birds |
VOL. XLIX MARCH No. 3 1956 BRITISH BIRDS THICK-BILLED WARBLER AT FAIR ISLE: A NEW BRITISH BIRD By KENNETH WILLIAMSON, VALERIE M. THOM (Fair Isle Bird Observatory), I. J. FERGUSON-LEES and H. E. AXELL AN example of the Thick-billed Warbler (Phragmaticola aedon), a bird from south-east Asia and apparently the first of its species to be recorded in Europe, was captured at Fair Isle on 6th October !955- In the fleeting glimpses we obtained of this bird in the field its large size and long, rounded tail at once attracted attention. The rufous rump, contrasting with the uniform olive-brown of the mantle and wings was a conspicuous feature, much more striking in the field than in the hand. In all these characteristics the bird strongly resembled a Great Reed Warbler (Acrocephalus arundinaceus). When flushed from the turnip rig in which it was found the bird immediately dived again into cover, and on next being disturbed flew to a dense growth of reedy grass and Heracleum sphondylium on the banks of a near-by burn. Its skulking behaviour as it crept between the stems suggested that an attempt to trap it at this site might prove successful, so the Yeoman net with a portable catching-box was assembled, giving a trap with an entrance less than 3 feet wide. With great caution the bird was moved from the turnips to the ditch, where it threaded its way through the vegetation until finally it was flutter ing against the glass of the box. The bird was taken to the laboratory for examination: there it was seen that the resemblance to a Great Reed Warbler was purely- superficial, and confined to size and plumage. -
Tanzania 16 - 27 April 2018 Tour Leader Tertius Gous Photographs by Tertius Gous Taken on This Tour
Tanzania 16 - 27 April 2018 Tour Leader Tertius Gous Photographs by Tertius Gous taken on this tour www.birdingafrica.com Day 0: The first day was spent birding and relaxing at our lodge near Kilimanjaro International Airport while we waited for everyone to arrive. The open Acacia savanna surrounding the lodge always provides a very productive start to the tour and notable sightings included Speckled and Blue- naped Mousebird, White-browed Coucal, Mourning Collared Dove, Little and African Palm Swift, European Roller, Grey-headed Kingfisher, African Hoopoe, Red-backed Shrike, Long-tailed Fiscal, Dark-capped Bulbul (the first of many!), Northern and Red-faced Crombec, Willow Warbler, Eastern Olivaceous Warbler, Tawny-flanked Prinia, Buff-bellied Warbler, Garden Warbler, Winding Cisticola, Spotted Flycatcher, Spotted Palm Thrush, Superb and Violet-backed Starling, Scarlet- chested and Variable Sunbird, Red-billed Firefinch, Blue-capped Cordon-bleu, Crimson-rumped Waxbill and Reichenow’s Seedeater, while Yellow-winged Bat showed well at the lodge. As a bonus, our lodge was perfectly situated for spectacular views of Mount Kilimanjaro, Africa's highest mountain and the highest free-standing mountain in the world. Days 1- 2: We spent two full days exploring the grasslands, lakes, woodlands and forests of Arusha National Park. Close to the entrance of the Park we found a breeding colony of Taveta Weavers supported by a few Golden-backed Weavers and an obliging Brown-breasted Barbet. Soon after we entered the Park an open grassy meadow produced good numbers of African Buffalo with numerous Red- billed Oxpeckers in attendance, as well as Bushbuck. Other mammals found in the grasslands and woodlands included Common Zebra, Giraffe, Warthog, Waterbuck, Kirk’s Dik-dik and numerous troops of Olive Baboons, while the forests held Harvey’s Duiker and the diminutive Suni. -
Avian Vision and the Evolution of Egg Color Mimicry in The
evo_65_7_cover 6/22/11 7:16 PM Page 1 Volume 65, Number 7, July 2011 VOLUME 65, NUMBER 7, JULY 2011 EVOLUTION VOLUME 65, NUMBER 7, PAGES PERSPECTIVE INTERNATIONAL JOURNAL OF ORGANIC EVOLUTION Convergence, Adaptation, and Constraint Jonathan B. Losos 1827–1840 ORIGINAL ARTICLES 1827 Neutral Biodiversity Theory can Explain the Imbalance of Phylogenetic Trees but not the Tempo –2132 of their Diversification T. Jonathan Davies, Andrew P. Allen, Luís Borda-de-A´gua, Jim Regetz, and Carlos J. Melián 1841–1850 The Impact of Gene-Tree/Species-Tree Discordance on Diversification-Rate Estimation Frank T. Burbrink and R. Alexander Pyron 1851–1861 Dealing with Incomplete Taxon Sampling and Diversification of a Large Clade of Mushroom-Forming Fungi Martin Ryberg and Patrick Brandon Matheny 1862–1878 EVOLUTION Diversity and Demography in Beringia: Multilocus Tests of Paleodistribution Models Reveal the Complex History of Arctic Ground Squirrels Kurt E. Galbreath, Joseph A. Cook, Aren A. Eddingsaas, and Eric G. DeChaine 1879–1896 The Genetic Architecture of Adaptation Under Migration-Selection Balance Sam Yeaman and Michael C. Whitlock 1897–1911 The Influence of an Innovative Locomotor Strategy on the Phenotypic Diversification of Triggerfish (Family: Balistidae) Alex Dornburg, Brian Sidlauskas, Francesco Santini, Laurie Sorenson, Thomas J. Near, and Michael E. Alfaro 1912–1926 The Tempo and Mode of Evolution: Body Sizes of Island Mammals Pasquale Raia and Shai Meiri 1927–1934 Mammals Evolve Faster on Smaller Islands Virginie Millien 1935–1944 Evolutionary Advantage of Small Populations on Complex Fitness Landscapes Kavita Jain, Joachim Krug, and Su-Chan Park 1945–1955 Interspecific X-Chromosome and Mitochondrial DNA Introgression in the Iberian Hare: Selection or Allele Surfing? July 2011 José Melo-Ferreira, Paulo C. -
Phenology and Body Mass Dynamics of the Garden Warbler
Revista Catalana d’Ornitologia 23:10-17, 2007 Phenology and body mass dynamics of the Garden Warbler Sylvia borin on the island of Cabrera (Balearic Islands) and in the Aiguamolls de l’Empordà (NE Iberian Peninsula) during spring migration Carles Barriocanal & David Robson As part of the Proggeto Piccole Isole the phenology and body-mass dynamics of the Garden Warbler Sylvia borin were studied between 1993 and 2001 on the island of Cabrera and in the Aiguamolls de l’Empordà. The migratory peak of the species occurred during the first week of May in the Aiguamolls and in the middle of May on the island of Cabrera. A seasonal increase in wing length was observed in both of these stopover sites. Depending on the year, passage through Cabrera occurred between one to eight days later than on the Iberian mainland. The lack of recaptures occurring more than one day after initial capture suggests that both localities are only used as brief stopover sites. The median number of days that birds stayed in the capture sites was one day. Body mass did not increase during stopovers, a finding that suggests that birds do not refuel in these locations. As reported in other studies, the Mediterranean islands are apparently not vital energy accumulation stopover points for birds such as the Garden Warbler migrating across the Mediterranean. The phenological and biometrical differences found in this study could correspond to some form of differential populational migration in the western Mediterranean. Key words: Garden Warbler, Sylvia borin, spring migration, Mediterranean Sea, islands Carles Barriocanal*, Grup de Recerca en Medi Ambient i Tecnologies de la Informació Geogràfica. -
Best of the Baltic - Bird List - July 2019 Note: *Species Are Listed in Order of First Seeing Them ** H = Heard Only
Best of the Baltic - Bird List - July 2019 Note: *Species are listed in order of first seeing them ** H = Heard Only July 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th Mute Swan Cygnus olor X X X X X X X X Whopper Swan Cygnus cygnus X X X X Greylag Goose Anser anser X X X X X Barnacle Goose Branta leucopsis X X X Tufted Duck Aythya fuligula X X X X Common Eider Somateria mollissima X X X X X X X X Common Goldeneye Bucephala clangula X X X X X X Red-breasted Merganser Mergus serrator X X X X X Great Cormorant Phalacrocorax carbo X X X X X X X X X X Grey Heron Ardea cinerea X X X X X X X X X Western Marsh Harrier Circus aeruginosus X X X X White-tailed Eagle Haliaeetus albicilla X X X X Eurasian Coot Fulica atra X X X X X X X X Eurasian Oystercatcher Haematopus ostralegus X X X X X X X Black-headed Gull Chroicocephalus ridibundus X X X X X X X X X X X X European Herring Gull Larus argentatus X X X X X X X X X X X X Lesser Black-backed Gull Larus fuscus X X X X X X X X X X X X Great Black-backed Gull Larus marinus X X X X X X X X X X X X Common/Mew Gull Larus canus X X X X X X X X X X X X Common Tern Sterna hirundo X X X X X X X X X X X X Arctic Tern Sterna paradisaea X X X X X X X Feral Pigeon ( Rock) Columba livia X X X X X X X X X X X X Common Wood Pigeon Columba palumbus X X X X X X X X X X X Eurasian Collared Dove Streptopelia decaocto X X X Common Swift Apus apus X X X X X X X X X X X X Barn Swallow Hirundo rustica X X X X X X X X X X X Common House Martin Delichon urbicum X X X X X X X X White Wagtail Motacilla alba X X -
Rejection Behavior by Common Cuckoo Hosts Towards Artificial Brood Parasite Eggs
REJECTION BEHAVIOR BY COMMON CUCKOO HOSTS TOWARDS ARTIFICIAL BROOD PARASITE EGGS ARNE MOKSNES, EIVIN ROSKAFT, AND ANDERS T. BRAA Departmentof Zoology,University of Trondheim,N-7055 Dragvoll,Norway ABSTRACT.--Westudied the rejectionbehavior shown by differentNorwegian cuckoo hosts towardsartificial CommonCuckoo (Cuculus canorus) eggs. The hostswith the largestbills were graspejectors, those with medium-sizedbills were mostlypuncture ejectors, while those with the smallestbills generally desertedtheir nestswhen parasitizedexperimentally with an artificial egg. There were a few exceptionsto this general rule. Becausethe Common Cuckooand Brown-headedCowbird (Molothrus ater) lay eggsthat aresimilar in shape,volume, and eggshellthickness, and they parasitizenests of similarly sizedhost species,we support the punctureresistance hypothesis proposed to explain the adaptivevalue (or evolution)of strengthin cowbirdeggs. The primary assumptionand predictionof this hypothesisare that somehosts have bills too small to graspparasitic eggs and thereforemust puncture-eject them,and that smallerhosts do notadopt ejection behavior because of the heavycost involved in puncture-ejectingthe thick-shelledparasitic egg. We comparedour resultswith thosefor North AmericanBrown-headed Cowbird hosts and we found a significantlyhigher propor- tion of rejectersamong CommonCuckoo hosts with graspindices (i.e. bill length x bill breadth)of <200 mm2. Cuckoo hosts ejected parasitic eggs rather than acceptthem as cowbird hostsdid. Amongthe CommonCuckoo hosts, the costof acceptinga parasiticegg probably alwaysexceeds that of rejectionbecause cuckoo nestlings typically eject all hosteggs or nestlingsshortly after they hatch.Received 25 February1990, accepted 23 October1990. THEEGGS of many brood parasiteshave thick- nestseither by grasping the eggs or by punc- er shells than the eggs of other bird speciesof turing the eggs before removal. Rohwer and similar size (Lack 1968,Spaw and Rohwer 1987). -
Egg-Spot Matching in Common Cuckoo Parasitism of the Oriental Reed
Li et al. Avian Res (2016) 7:21 DOI 10.1186/s40657-016-0057-y Avian Research RESEARCH Open Access Egg‑spot matching in common cuckoo parasitism of the oriental reed warbler: effects of host nest availability and egg rejection Donglai Li1†, Yanan Ruan1†, Ying Wang1, Alan K. Chang1, Dongmei Wan1* and Zhengwang Zhang2 Abstract Background: The success of cuckoo parasitism is thought to depend largely on the extent of egg matching between cuckoo and host eggs, since poor-matching cuckoo egg would lead to more frequent egg rejection by the host. In this study, we investigated how egg-spot matching between the Common Cuckoo (Cuculus canorus) and its host, the Oriental Reed Warbler (Acrocephalus orientalis) is affected by the local parasitism rate, nest availability in breeding synchronization and egg rejection. Methods: We used the paired design of parasitized and their nearest non-parasitized nests where breeding occurred simultaneously to compare egg-spot matching. The image analysis was used to compare four eggshell pattern vari- ables, namely spot size, density, coverage on the different areas of egg surface, and the distribution on the whole egg surface. Egg recognition experiments were conducted to test the effect of egg spots on egg rejection by the host. Results: Our results show that much better matching in almost all spot parameters tested on the side of the egg and the spot distribution on the whole egg occurred in parasitized nests than in non-parasitized nests. Matching of spot density between cuckoo and host eggs in parasitized nests increased with the synchronization between temporal availability of nests and the egg-laying period of female cuckoos. -
Is the Sardinian Warbler Sylvia Melanocephala Displacing the Endemic Cyprus Warbler S
Is the Sardinian Warbler Sylvia melanocephala displacing the endemic Cyprus Warbler S. melanothorax on Cyprus? PETER FLINT & ALISON MCARTHUR We firstly describe the history, status, distribution and habitats of the two species on the island. In the light of this the evidence for a decline in Cyprus Warbler numbers in the areas colonised by Sardinian Warbler is assessed and is found to be compelling. Possible reasons for this decline are examined; they are apparently complex, but primarily Cyprus Warbler appears to have stronger interspecific territoriality than Sardinian Warbler and may treat the latter territorially at least to some extent as a conspecific, with some tendency to avoid its home-ranges, especially their centres. Other important factors may be interspecific aggression from Sardinian Warbler (where its population density is high) which might reduce Cyprus Warbler’s ability to establish breeding territories; and competition from Sardinian Warbler for food and for autumn/winter territories. Also, Sardinian Warbler appears to be more efficient in exploiting the habitats of the endemic species, which may have reached a stage in its evolution as an island endemic where it is vulnerable to such an apparently fitter invading congener from the mainland. The changing climate on the island may also be a factor. We conclude that Sardinian Warbler does appear to be displacing Cyprus Warbler, and we recommend that the latter’s conservation status be re-assessed. INTRODUCTION Sardinian Warbler Sylvia melanocephala, previously known only as a winter visitor, was found breeding on Cyprus in 1992 (Frost 1995) and is rapidly spreading through the island (eg Cozens & Stagg 1998, Cyprus Ornithological Society (1957)/BirdLife Cyprus annual reports and newsletters, Ieronymidou et al 2012) often breeding at high densities within the same areas as the endemic Cyprus Warbler S. -
A New Subspecies of Eurasian Reed Warbler Acrocephalus Scirpaceus in Egypt
Jens Hering et al. 101 Bull. B.O.C. 2016 136(2) A new subspecies of Eurasian Reed Warbler Acrocephalus scirpaceus in Egypt by Jens Hering, Hans Winkler & Frank D. Steinheimer Received 4 December 2015 Summary.—A new subspecies of European Reed Warbler Acrocephalus scirpaceus is described from the Egypt / Libya border region in the northern Sahara. Intensive studies revealed the new form to be clearly diagnosable within the Eurasian / African Reed Warbler superspecies, especially in biometrics, habitat, breeding biology and behaviour. The range of this sedentary form lies entirely below sea level, in the large depressions of the eastern Libyan Desert, in Qattara, Siwa, Sitra and Al Jaghbub. The most important field characters are the short wings and tarsi, which are significantly different from closely related A. s. scirpaceus, A. s. fuscus and A. s. avicenniae, less so from A. baeticatus cinnamomeus, which is more clearly separated by behaviour / nest sites and toe length. Molecular genetic analyses determined that uncorrected distances to A. s. scirpaceus are 1.0–1.3%, to avicenniae 1.1–1.5% and to fuscus 0.3–1.2%. The song is similar to that of other Eurasian Reed Warbler taxa as well as that of African Reed Warbler A. baeticatus, but the succession of individual elements appears slower than in A. s. scirpaceus and therefore shows more resemblance to A. s. avicenniae. Among the new subspecies’ unique traits are that its preferred breeding habitat in the Siwa Oasis complex, besides stands of reed, is date palms and olive trees. A breeding density of 107 territories per 10 ha was recorded in the cultivated area. -
EUROPEAN BIRDS of CONSERVATION CONCERN Populations, Trends and National Responsibilities
EUROPEAN BIRDS OF CONSERVATION CONCERN Populations, trends and national responsibilities COMPILED BY ANNA STANEVA AND IAN BURFIELD WITH SPONSORSHIP FROM CONTENTS Introduction 4 86 ITALY References 9 89 KOSOVO ALBANIA 10 92 LATVIA ANDORRA 14 95 LIECHTENSTEIN ARMENIA 16 97 LITHUANIA AUSTRIA 19 100 LUXEMBOURG AZERBAIJAN 22 102 MACEDONIA BELARUS 26 105 MALTA BELGIUM 29 107 MOLDOVA BOSNIA AND HERZEGOVINA 32 110 MONTENEGRO BULGARIA 35 113 NETHERLANDS CROATIA 39 116 NORWAY CYPRUS 42 119 POLAND CZECH REPUBLIC 45 122 PORTUGAL DENMARK 48 125 ROMANIA ESTONIA 51 128 RUSSIA BirdLife Europe and Central Asia is a partnership of 48 national conservation organisations and a leader in bird conservation. Our unique local to global FAROE ISLANDS DENMARK 54 132 SERBIA approach enables us to deliver high impact and long term conservation for the beneit of nature and people. BirdLife Europe and Central Asia is one of FINLAND 56 135 SLOVAKIA the six regional secretariats that compose BirdLife International. Based in Brus- sels, it supports the European and Central Asian Partnership and is present FRANCE 60 138 SLOVENIA in 47 countries including all EU Member States. With more than 4,100 staf in Europe, two million members and tens of thousands of skilled volunteers, GEORGIA 64 141 SPAIN BirdLife Europe and Central Asia, together with its national partners, owns or manages more than 6,000 nature sites totaling 320,000 hectares. GERMANY 67 145 SWEDEN GIBRALTAR UNITED KINGDOM 71 148 SWITZERLAND GREECE 72 151 TURKEY GREENLAND DENMARK 76 155 UKRAINE HUNGARY 78 159 UNITED KINGDOM ICELAND 81 162 European population sizes and trends STICHTING BIRDLIFE EUROPE GRATEFULLY ACKNOWLEDGES FINANCIAL SUPPORT FROM THE EUROPEAN COMMISSION. -
Trip Report May 11 – 23, 2019 |Written by Carlos Sanchez
Spain: Birding & Nature | Trip Report May 11 – 23, 2019 |Written by Carlos Sanchez Guide: Carlos Sanchez, with 6 participants: Christine, Laura, Brad, Cathy, Elizabeth, & Richard Naturalist Journeys, LLC | Caligo Ventures PO Box 16545 Portal, AZ 85632 PH: 520.558.1146 | 866.900.1146 Fax 650.471.7667 naturalistjourneys.com | caligo.com [email protected] | [email protected] Sat., May 11 Arrivals in Madrid | Gredos After meeting at our comfortable hotel in Madrid at around 9 a.m. we began our journey west through the city of Madrid towards the alpine scenery of the Gredos Mountains. After about an hour’s drive, we made our first stop at the Bulls of Guisando. The four ancient granite sculptures were built by an ancient Celtiberian tribe around the 2nd century BCE. They are a recurrent feature in Spanish literature, including the novel Dox Quixote by Miguel de Cervantes. As it was spring, the surrounding riparian woodlands rang with the calls of nesting birds such as Cetti’s Warbler, Common Nightingale, and we saw our first European Bee-eaters flying overhead. After an incredible lunch overlooking a forested valley, we continued onwards to Puerto del Pico in the Sierra de Gredos. This mountain pass, at about 4,600 ft, was already far above the tree line (the tree line is surprisingly low in Spain), and we could clearly see an ancient Roman road stretching out before us–still in excellent condition even after two millennia. A little patch of trees in the parking lot held our first Great and Blue Tit, as well as our first Common Firecrest.