scholarly journals Regional and age-dependent differences in the effect of wind on the migratory routes of Eleonora’s falcon

2015 ◽  
Vol 61 (3) ◽  
pp. 428-434 ◽  
Author(s):  
Ugo Mellone ◽  
Rubén Limiñana ◽  
Pascual López-López ◽  
Vicente Urios
Keyword(s):  
Satellite Telemetry ◽  
Daily Movement ◽  
Movement Rates ◽  
Equatorial Africa ◽  
Ecological Barriers ◽  
Age Dependent ◽  
Migratory Routes ◽  
Wintering Area ◽  
Orientation Mechanism ◽  
Eleonora’S Falcon

Abstract During migration, birds can show different responses to wind in relation to distance to the goal, experience, ecological barriers and visibility of landmarks. We analysed the effect of wind (tailwinds and crosswinds) on daily movement rates (forward and perpendicular) of Eleonora’s falcons using ARGOS satellite telemetry, during their trans-continental autumn migration to Madagascar, in relation to the different crossed regions and individuals’ age class. Our results showed that the effect of wind on daily movement rates was not uniform, being stronger in the farthest region from the migration goal, the Sahara desert, with adults being more affected than juveniles in this region. In the Sahel, the results were more conflicting, perhaps because daily movements were more shaped by the distribution of food resources. In Equatorial Africa, daily movement rates were mainly affected by crosswinds. Still, it remains unclear which orientation mechanism allows Eleonora’s falcons to reach such a narrow wintering area compensating also for wind displacement.

scholarly journals All across Africa: highly individual migration routes of Eleonora's falcon

2008 ◽  
Vol 275 (1653) ◽  
pp. 2887-2896 ◽  
Author(s):  
Marion Gschweng ◽  
Elisabeth K.V Kalko ◽  
Ulrich Querner ◽  
Wolfgang Fiedler ◽  
Peter Berthold
Keyword(s):  
West Africa ◽  
Satellite Telemetry ◽  
Late Summer ◽  
Breeding Period ◽  
Migration Route ◽  
Migration Routes ◽  
Long Distance ◽  
Wintering Area ◽  
Eleonora’S Falcon ◽  
Falco Eleonorae

Eleonora's falcon ( Falco eleonorae ) is a rare raptor species that delays its breeding period until late summer to feed its young with passerines at the peak of autumn migration. Since the 1950s, this slender winged falcon has been believed to migrate along a historical route via the Red Sea to its main wintering area in Madagascar. In our study, we used satellite telemetry to investigate the real migration route of Eleonora's falcons and found that the species displayed a highly individual migration pattern. Furthermore, juvenile falcons migrated via West Africa to Madagascar and two juveniles could be tracked during spring migration and to their summering areas in East and West Africa. As juveniles migrated independently of adults, we discuss inherited navigation strategies forming part of a complex navigation system. We propose the idea of an orientation mechanism that naive falcons could apply during their long-distance migration towards their faraway wintering area located in the open ocean.

scholarly journals Use of satellite telemetry data, GIS, and HTML to create an interactive display of caribou movements

Rangifer ◽  
2003 ◽  
Vol 23 (5) ◽  
pp. 101
Author(s):  
Alexander K. Prichard ◽  
Geoffry M. Carroll ◽  
John C. George ◽  
Stephen M. Murphy ◽  
Mike D. Smith ◽  
...  
Keyword(s):  
General Public ◽  
Annual Variation ◽  
Satellite Telemetry ◽  
Telemetry Data ◽  
Daily Movement ◽  
Movement Rates ◽  
Interactive Display ◽  
Wintering Areas

The use of animation clearly reveals the large annual variation in wintering areas and large differences in daily movement rates for this herd. This interactive display can be adapted for school groups, subsistence hunters, the general public, or scientists.

scholarly journals Seasonal movements of caribou in arctic Alaska as determined by satellite

1989 ◽  
Vol 67 (3) ◽  
pp. 644-650 ◽  
Author(s):  
S. G. Fancy ◽  
L. F. Pank ◽  
K. R. Whitten ◽  
W. L. Regelin
Keyword(s):  
Adult Female ◽  
Rangifer Tarandus ◽  
Satellite Telemetry ◽  
Activity Data ◽  
Seasonal Movements ◽  
Terrestrial Mammal ◽  
Daily Movement ◽  
Movement Rates ◽  
Arctic Alaska

Between 1985 and 1987, 49 283 locations and 79 101 sets of activity data were obtained for 34 adult female caribou (Rangifer tarandus granti) of the Porcupine and Central Arctic herds using satellite telemetry. Daily movement rates of female caribou from the two herds, which differ greatly in size and separation of seasonal ranges, were similar except during the spring and fall migration periods. Movement rates in July exceeded those during migration in both herds. The minimum annual distances travelled by caribou cows, ranging to 5055 km, were the longest movements documented for any terrestrial mammal.

scholarly journals Extensive daily movement rates measured in territorial arctic foxes

2021 ◽  
Author(s):  
Marie‐Pier Poulin ◽  
Jeanne Clermont ◽  
Dominique Berteaux
Keyword(s):  
Daily Movement ◽  
Movement Rates ◽  
Arctic Foxes

Movement patterns of female feral camels in central and northern Australia

2001 ◽  
Vol 28 (3) ◽  
pp. 283 ◽  
Author(s):  
Glenn P. Edwards ◽  
Stephen R. Eldridge ◽  
David Wurst ◽  
David M. Berman ◽  
Vanessa Garbin
Keyword(s):  
Kernel Method ◽  
Satellite Telemetry ◽  
Movement Patterns ◽  
Annual Rainfall ◽  
Northern Australia ◽  
Buffer Zones ◽  
Movement Rates ◽  
Environmentally Sensitive Areas ◽  
Large Home Range ◽  
Pattern Of Variation

Movement patterns of female feral camels were studied over four years (February 1993 to December 1996) in central and northern Australia using satellite telemetry. Areas used over 12-month periods (calculated using the fixed kernel method) were large (449–4933 km 2 ) and increased with increasing aridity as measured by long-term mean annual rainfall. No consistent pattern of variation was detected in movement rates of camels across seasons. Data collected over several years are needed to classify movements in feral camels. The only telemetered camel that has been monitored for longer than two years (this study) appeared to move within a large home range over the concluding 3.5 years that it was tracked. Because the areas used are large, extensive buffer zones will be needed in arid regions to protect environmentally sensitive areas from the impacts of feral camels.

Mapping the migratory routes and wintering areas of Lesser Kestrels Falco naumanni: new insights from satellite telemetry

Ibis ◽  
2012 ◽  
Vol 154 (2) ◽  
pp. 389-399 ◽  
Author(s):  
RUBEN LIMIÑANA ◽  
MARTA ROMERO ◽  
UGO MELLONE ◽  
VICENTE URIOS
Keyword(s):  
Satellite Telemetry ◽  
Falco Naumanni ◽  
Migratory Routes ◽  
Wintering Areas

scholarly journals Summer pre-breeding movements of Eleonora’s Falcon Falco eleonorae revealed by satellite telemetry: implications for conservation

2013 ◽  
Vol 23 (4) ◽  
pp. 487-494 ◽  
Author(s):  
UGO MELLONE ◽  
PASCUAL LÓPEZ-LÓPEZ ◽  
RUBÉN LIMIÑANA ◽  
VICENTE URIOS
Keyword(s):  
Migratory Birds ◽  
Satellite Telemetry ◽  
Population Level ◽  
Western Mediterranean ◽  
Breeding Period ◽  
Long Distance ◽  
Priority Species ◽  
Wintering Areas ◽  
Eleonora’S Falcon ◽  
Falco Eleonorae

SummaryRecent advances in bird tracking technologies are revealing that migratory birds use temporal staging sites other than breeding and wintering areas, and these areas deserve conservation efforts. Eleonora’s Falcon Falco eleonorae is a long-distance migratory raptor that breeds colonially on islands and is considered a priority species for conservation. Anecdotal observations indicate that during the pre-breeding period, Eleonora’s Falcons stay in inland areas far away from the colonies, but, to date there are no detailed data concerning the connectivity between these areas and breeding colonies. Using satellite telemetry, we analysed data from four summering events belonging to three individuals breeding in two colonies in the Western Mediterranean (Spain). All of them made inland movements in areas up to c.400 km distant from the respective breeding colonies, visiting several habitats, from forests to arable lands, probably taking advantage of high densities of insects. Perturbations occurring in these areas could threaten Eleonora’s Falcons with serious consequences at the population level. We suggest that conservation measures implemented at breeding and wintering grounds may not suffice and that temporary staging areas should be identified at a larger scale and deserve protection as well.

scholarly journals Winter distribution of woodland caribou in relation to clear-cut logging in west-central Alberta

2000 ◽  
Vol 78 (8) ◽  
pp. 1433-1440 ◽  
Author(s):  
Kirby G Smith ◽  
E Janet Ficht ◽  
David Hobson ◽  
Troy C Sorensen ◽  
David Hervieux
Keyword(s):  
Rangifer Tarandus ◽  
Timber Harvest ◽  
Timber Harvesting ◽  
Home Range Size ◽  
Woodland Caribou ◽  
Daily Movement ◽  
Movement Rates ◽  
Clear Cut ◽  
Winter Range ◽  
West Central

The responses of a herd of migratory woodland caribou (Rangifer tarandus caribou) to timber harvesting that fragmented about 11% of their winter range in west-central Alberta were examined in this study. From 1981 to 1996, 45 caribou were radio-collared and monitored during the initiation and completion of first-pass timber harvest (50% removal). Variables examined were home-range size, daily movement rates, and distance to the nearest cut block for radio-collared individuals. Daily movement rates and individual winter range sizes decreased as timber harvesting progressed. Caribou avoided using recently fragmented areas by an average of 1.2 km. If fragmentation of the winter range continues through timber harvesting and other industrial activities, the "spacing out" antipredator strategy used by caribou may be compromised. Based on these findings, timber-harvesting strategies are recommended that (i) ensure an adequate area of usable habitat to support the current population, (ii) minimize the amount of fragmented area, and (iii) in the short term avoid presently defined core use areas.

scholarly journals Seasonal Movements and Pelagic Habitat Use of Murres and Puffins Determined by Satellite Telemetry

The Condor ◽  
2000 ◽  
Vol 102 (1) ◽  
pp. 145-154 ◽  
Author(s):  
Scott A. Hatch ◽  
Paul M. Meyers ◽  
Danial M. Mulcahy ◽  
David C. Douglas
Keyword(s):  
Bering Sea ◽  
Chukchi Sea ◽  
Satellite Telemetry ◽  
Gulf Of Alaska ◽  
Differential Mortality ◽  
Breeding Period ◽  
Common Murres ◽  
Pelagic Habitat ◽  
Satellite Transmitters ◽  
Wintering Area

AbstractWe tracked the movements of Common Murres (Uria aalge), Thick-billed Murres (U. lomvia), and Tufted Puffins (Fratercula cirrhata) using surgically implanted satellite transmitters. From 1994–1996, we tagged 53 birds from two colonies in the Gulf of Alaska (Middleton Island and Barren Islands) and two colonies in the Chukchi Sea (Cape Thompson and Cape Lisburne). Murres and puffins ranged 100 km or farther from all colonies in summer, but most instrumented birds had abandoned breeding attempts and their movements likely differed from those of actively breeding birds. However, murres whose movements in the breeding period suggested they still had chicks to feed foraged repeatedly at distances of 50–80 km from the Chukchi colonies in 1995. We detected no differences in the foraging patterns of males and females during the breeding season, nor between Thick-billed and Common Murres from mixed colonies. Upon chick departure from the northern colonies, male murres—some believed to be tending their flightless young—drifted with prevailing currents toward Siberia, whereas most females flew directly south toward the Bering Sea. Murres from Cape Thompson and Cape Lisburne shared a common wintering area in the southeastern Bering Sea in 1995, and birds from Cape Lisburne returned to the same area in the winter of 1996. We conclude that differences in foraging conditions during summer rather than differential mortality rates in winter account for contrasting population trends previously documented in those two colonies.

scholarly journals First description of autumn migration of Sooty Falcon Falco concolor from the United Arab Emirates to Madagascar using satellite telemetry

2011 ◽  
Vol 22 (1) ◽  
pp. 106-119 ◽  
Author(s):  
SÁLIM JAVED ◽  
DAVID C. DOUGLAS ◽  
SHAHID KHAN ◽  
JUNID NAZEER SHAH ◽  
ABDULLAH ALI AL HAMMADI
Keyword(s):  
United Arab Emirates ◽  
Satellite Telemetry ◽  
Arabian Gulf ◽  
Migration Pattern ◽  
Autumn Migration ◽  
Western Coast ◽  
Migration Route ◽  
Wintering Area ◽  
Solar Powered ◽  
And Migration

SummaryThe movement and migration pattern of the ‘Near Threatened’ Sooty Falcon Falco concolor is poorly known. Sooty Falcons breed on the islands of the Arabian Gulf after arriving from their non-breeding areas that are mainly in Madagascar. In the first satellite tracking of the species we fitted a 9.5 g Argos solar powered transmitter on an adult breeding Sooty Falcon off the western coast of Abu Dhabi in the United Arab Emirates. The bird successfully undertook autumn migration to Madagascar, a known wintering area for the species. We document the Sooty Falcon’s autumn migration route and stop-over sites. The adult Sooty Falcon initiated its migration at night and with tailwinds, and travelled mainly during daytime hours for 13 days over an inland route of more than 5,656 km. The three stop-over sites in East Africa were characterised by moderate to sparse shrub cover associated with potential sources of water. We discuss the migration pattern of the tracked bird in relation to importance of non-breeding areas for Sooty Falcons and recent declines in numbers in their breeding range.

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