scholarly journals Difference in Migration Pattern Between Adult and Immature Birds Using Satellites

The Auk ◽  
2002 ◽  
Vol 119 (3) ◽  
pp. 832-835
Author(s):  
Mutsuyuki Ueta ◽  
Hiroyoshi Higuchi
Keyword(s):  
Spring Migration ◽  
Migration Pattern ◽  
Migration Routes ◽  
Migration Distance ◽  
Migration Period ◽  
Stopover Sites ◽  
Fat Stores ◽  
Resting Period ◽  
Total Migration

Abstract We satellite-tracked Steller's Sea Eagles (Haliaeetus pelagicus), Black-faced Spoonbills (Platalea minor), and White-naped Cranes (Grus vipio) to determine migration routes and stopover tactics of adult and immature birds. During spring migration, there were no significant differences between adult and immature birds in total migration distance and distance between stopover sites, but the migration period and resting period at stopover sites were significantly longer in immature individuals. There are two possible tactics for migrating without expending fat stores: longer rests or shorter migration distances between stopover sites. Our results suggest that immature birds try to increase fat stores by increasing time available for foraging at stopover sites.

scholarly journals The familiar area hypothesis and movement patterns of wild forest reindeer in Karelia, Northern Europe

Rangifer ◽  
1986 ◽  
Vol 6 (2) ◽  
pp. 235 ◽  
Author(s):  
E. Pulliainen ◽  
P. I. Danilov ◽  
K. Heikura ◽  
E. Erkinaro ◽  
S. Sulkava ◽  
...  
Keyword(s):  
Small Groups ◽  
Rangifer Tarandus ◽  
Movement Patterns ◽  
Spring Migration ◽  
Exploratory Behaviour ◽  
Autumn Migration ◽  
Northern Europe ◽  
Migration Routes ◽  
Migration Period ◽  
Restricted Area

The relevance of the familiar area hypothesis to the behaviour of the wild forest reindeer (Rangifer tarandus fennicus Lönnb.) was studied in a Fenno-Soviet project by radio and field tracking of these ungulates in Karelia, Northern Europe, in 1978 - 1985. This subpopulation (500 - 600 exx.) has a tradition of overwintering in a restricted area around Lake Lentua (ca. 1000 km2). The spring migration period is shorter in length than the autumn migration. The migration routes are generally the same in autumn and spring, although exceptions occur, indicating exploratory behaviour. The large winter herds disband into small groups or lone individuals for the summertime, when this subpopulation is spread over a much wider area (ca. 5400 km2). It is concluded that the observations made support the familiar area hypothesis in all essential points.

scholarly journals Satellite tracking reveals a new migration route of black-necked cranes (Grus nigricollis) in Qinghai-Tibet Plateau

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9715
Author(s):  
Ye Wang ◽  
Chunrong Mi ◽  
Yumin Guo
Keyword(s):  
Spring Migration ◽  
Tibet Plateau ◽  
Autumn Migration ◽  
Migration Route ◽  
Vulnerable Species ◽  
Migration Routes ◽  
Migration Patterns ◽  
Stopover Sites ◽  
Grus Nigricollis ◽  
Spatio Temporal

Background The black-necked crane (Grus nigricollis) is a vulnerable species and the only species that lives in the plateau. Five migration routes of different populations have been identified, but for cranes wintering in Nyingchi Prefecture, Tibet, the migration route and breeding/summering area are still unknown. The aim of this study was to investigate the spatio-temporal migration patterns of black-necked cranes in this area and to identify important areas for conservation. Methods In 2016, we fitted seven black-necked cranes in Nyingchi with GPS-GSM satellite transmitters to record their migration routes. We used ArcGIS 10.2 to visualize important stopover sites and the ‘ggplot’ function in R to analyze the migration patterns. Results From March 2016 to May 2019, we recorded nine spring migration and four autumn migration tracks from five individuals. Four individuals spent the breeding/summering season in Qinghai Lake, while the other spent the breeding/summering season in the Jinzihai Wetland of Dulan County, Qinghai Province. Detailed spatio-temporal information showed that the spring migration lasted 8.7 ± 4.6 days and covered 1,182.5 ± 90.4 km, while the autumn migration lasted 30 ± 10.6 days and covered 1,455.7 ± 138 km. Basom Lake and the Shazhuyu River were the most important stopover sites during the spring and autumn migrations, respectively. The cranes spent 4.4 ± 3.7 days in Basom Lake and 26.3 ± 10.7 days in the Shazhuyu River. The black-necked cranes mainly migrated during the daytime (>85 % of the fly points), and 81 % (17/21) of all stopover and roosting sites were in the valley or at lakeside swamps. Only 17.7% (516 / 2,914) of the data points for stopover and roosting sites were in protected areas. Main conclusions Our study revealed the breeding/summering areas and migration routes of the black-necked cranes wintering in Nyingchi. These results contribute to a better understanding of the annual spatio-temporal migration patterns and the development of conservation plans for this vulnerable species.

scholarly journals Migration routes and stopover sites of the Eurasian Spoonbill (Platalea leucorodia) between the Carpathian Basin and wintering areas

2016 ◽  
Vol 24 (1) ◽  
pp. 128-149 ◽  
Author(s):  
Csaba Pigniczki ◽  
Jelena Kralj ◽  
Stefano Volponi ◽  
Antun Žuljević ◽  
Mohamed-Ali Dakhli ◽  
...  
Keyword(s):  
Statistical Significance ◽  
River Mouth ◽  
Balkan Peninsula ◽  
Spring Migration ◽  
Carpathian Basin ◽  
Autumn Migration ◽  
Western Coast ◽  
Migration Routes ◽  
Stopover Sites ◽  
Wintering Areas

Abstract Understanding the migration routes of the Central European Spoonbill population is important for their conservation. Here we analysed movements of 3186 individuals of Eurasian Spoonbills marked with colour rings in the Carpathian Basin (Hungary, Croatia and Serbia) between 2003 and 2015, and a satellite tagged individual, which was equipped in Italy in 2013, and later moved to the Carpathian Basin. Migration routes of these Spoonbills predominantly followed the Adriatic Flyway, however, some birds were also found to both east and west from this flyway. We identified 59 stopover sites, 55 of which were located along the Adriatic Flyway. Colourringed juveniles (1cy), on average, spent 4.0±0.9 (SE) days on the stopover sites along the Adriatic Flyway during autumn migration, while non-juveniles (> 1cy) spent 2.6±1.0 (SE) days during autumn and 2.1±0.4 (SE) days during spring migration there. These durations were not significantly different. Duration of stops of the satellite tracked individual was between 7 and 15 days during autumn and between 1 and 12 days during spring migration. Our results indicate the existence of two alternative routes of the Adriatic Flyway between the Carpathian Basin and the wintering areas in southern Italy and the central part of coastal North-Africa. The North-Adriatic Flyway includes stopover sites in north-eastern Italy at the river mouth of River Isonzo, Lagunes of Venice and wetlands around River Po. The South Adriatic Flyway leads through the Balkan Peninsula, with stopover sites at the karst lakes of Bosnia and Herzegovina, mouth of the river Neretva (Croatia), Ulcinj Salinas (Montenegro) and wetlands in Gulf of Manfredonia (Italy). This hypothesis was also supported by the migration of the satellite tagged individual, the paths of which was described here in detail. The average coordinates of spring and autumn stopover sites were located at different parts of the flyway: it was in south-western Italy during autumn migration, while it was close to the western coast of the Balkan Peninsula during spring migration. We found examples for Spoonbills using the same migration paths along the same route year by year on both spring and autumn migration, but also noticed shifts between routes. Some observations indicate that individuals may show site fidelity to stopover sites between years, although the sample size was low for statistical significance.

scholarly journals Geolocators reveal migration routes, stopover sites, and nonbreeding dispersion in a population of Cerulean Warblers

2020 ◽  
Vol 7 (1) ◽  
pp. 19-26
Author(s):  
Clayton D Delancey ◽  
Kamal Islam ◽  
Gunnar R Kramer ◽  
Garrett J MacDonald ◽  
Alexander R Sharp ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Spring Migration ◽  
Autumn Migration ◽  
Migration Routes ◽  
Neotropical Migrant ◽  
Wood Warblers ◽  
Before And After ◽  
The Caribbean ◽  
Declining Species ◽  
Cerulean Warblers

AbstractCerulean Warblers (Setophaga cerulea) are among the fastest declining Nearctic-Neotropical migrant wood-warblers (Parulidae) in North America. Despite ongoing conservation efforts, little is known about their non-breeding distribution. In June 2016-2018, we deployed geolocators (n = 30) on adult male Cerulean Warblers in Indiana, USA, to track annual movements of individuals. Recovered geolocators (n = 4) showed that Cerulean Warblers occurred broadly throughout northern South America. Autumn migration lasted 44-71 days (n = 4), whereas spring migration lasted 37-41 days (n = 3). The average migration distance was 5268 km. During autumn migration, Cerulean Warblers made 1-4 stopovers (i.e., ≥2 days; n = 4) and 1-2 stopovers during spring migration (n = 3). When crossing the Gulf of Mexico during autumn migration, two birds stopped over after crossing, but not beforehand. Two others navigated through the Caribbean rather than crossing the Gulf of Mexico. During spring migration, one individual stopped after crossing, one individual stopped before crossing, and one individual stopped before and after crossing the Gulf of Mexico. No birds migrated through the Caribbean Islands during spring migration. These results represent novel information describing annual movements of individual Cerulean Warblers and will inform conservation efforts for this declining species.

scholarly journals Mining citizen science data to explore stopover sites and spatiotemporal variation in migration patterns of the red-footed falcon

2020 ◽  
Vol 66 (5) ◽  
pp. 467-475 ◽  
Author(s):  
Anastasios Bounas ◽  
Maria Solanou ◽  
Michele Panuccio ◽  
Sanja Barišić ◽  
Taulant Bino ◽  
...  
Keyword(s):  
Citizen Science ◽  
Conservation Strategies ◽  
Migration Routes ◽  
Central Mediterranean ◽  
Science Data ◽  
Yearly Variation ◽  
Migration Patterns ◽  
Species Migration ◽  
Stopover Sites ◽  
The Mediterranean

Abstract Citizen science data have already been used to effectively address questions regarding migration, a fundamental stage in the life history of birds. In this study, we use data from eBird and from 3 additional regional citizen science databases to describe the migration routes and timing of the red-footed falcon Falco vespertinus in the Mediterranean region across 8 years (2010–2017). We further examine the seasonal and yearly variation in migration patterns and explore sites used during the species migration. Our results suggest that the autumn passage is spatially less variable and temporally more consistent among years than in spring and that birds migrate faster in spring than in autumn. The species seems to be more prevalent along the Central Mediterranean during spring migration, probably as a result of the clockwise loop migration that red-footed falcons perform. There was a high variation in annual median migration dates for both seasons as well as in migration routes across years and seasons. Higher variation was exhibited in the longitudinal component thus indicating flexibility in migration routes. In addition, our results showed the species’ preference for lowlands covered with cropland and mosaics of cropland and natural vegetation as stopover sites during migration. Stopover areas predicted from our distribution modeling highlight the importance of the Mediterranean islands as stopover sites for sea-crossing raptors, such as the red-footed falcon. This study is the first to provide a broad-scale spatiotemporal perspective on the species migration across seasons, years and flyways and demonstrates how citizen science data can inform future monitoring and conservation strategies.

scholarly journals Tracking the Autumn Migration of the Bar-Headed Goose (Anser indicus) with Satellite Telemetry and Relationship to Environmental Conditions

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Yaonan Zhang ◽  
Meiyu Hao ◽  
John Y. Takekawa ◽  
Fumin Lei ◽  
Baoping Yan ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Habitat Type ◽  
Autumn Migration ◽  
Qinghai Lake ◽  
Vegetation Coverage ◽  
Migration Routes ◽  
Mountainous Regions ◽  
Stopover Sites

The autumn migration routes of bar-headed geese captured before the 2008 breeding season at Qinghai Lake, China, were documented using satellite tracking data. To assess how the migration strategies of bar-headed geese are influenced by environmental conditions, the relationship between migratory routes, temperatures, and vegetation coverage at stopovers sites estimated with the Normalized Difference Vegetation Index (NDVI) were analyzed. Our results showed that there were four typical migration routes in autumn with variation in timing among individuals in start and end times and in total migration and stopover duration. The observed variation may be related to habitat type and other environmental conditions along the routes. On average, these birds traveled about 1300 to 1500 km, refueled at three to six stopover sites and migrated for 73 to 83 days. The majority of the habitat types at stopover sites were lake, marsh, and shoal wetlands, with use of some mountainous regions, and farmland areas.

Breeding dispersal directions in the white stork (Ciconia ciconia) are affected by spring migration routes

2010 ◽  
Vol 28 (2) ◽  
pp. 393-397 ◽  
Author(s):  
Naomi Itonaga ◽  
Ulrich Köppen ◽  
Martin Plath ◽  
Dieter Wallschläger
Keyword(s):  
Spring Migration ◽  
White Stork ◽  
Breeding Dispersal ◽  
Migration Routes ◽  
Ciconia Ciconia

Migration Routes and Stopover Sites of Upland Geese Chloephaga Picta in South America

2018 ◽  
Vol 11 (2) ◽  
pp. 89-99 ◽  
Author(s):  
Julieta Pedrana ◽  
Klemens Pütz ◽  
Lucía Bernad ◽  
Juan Pablo Seco Pon ◽  
Antonella Gorosabel ◽  
...  
Keyword(s):  
South America ◽  
Large Scale ◽  
Buenos Aires Province ◽  
Migration Routes ◽  
Stopover Sites ◽  
Precise Knowledge ◽  
Southern Patagonia ◽  
Breeding Grounds ◽  
Migratory Routes ◽  
Upland Goose

The Upland Goose (Chloephaga picta picta) is a migratory species of South America, which breeds from September to April in Patagonia (Argentina and Chile) and winters from May to September in the southern Pampas (Argentina). Despite some protection in both countries, this species is still persecuted and large numbers are killed by unregulated hunting. Therefore, precise knowledge of their migratory routes is vital to ensure protection of necessary resources and sites throughout the year. We deployed five miniaturised satellite transmitters on adult Upland Geese to gather data about breeding, wintering and stopover sites all along their migratory routes. We aimed to identify important areas in the wintering and breeding grounds through kernel density analyses, and to match these sites along the migration routes with protected areas. Tracked birds exhibited different migration routes and reached different breeding grounds. Two individuals travelled from their wintering grounds in Buenos Aires province to their presumed breeding areas in southern Patagonia. However, we also found different stopover sites from another bird in northern Patagonia, from the ones postulated before, and evidence that some Upland Geese are not large-scale migrants. Our results highlight a considerable amount of plasticity in Upland Geese migratory behaviour. This study represents an essential first step towards identifying important stopover sites along the Upland Geese flyways and it also highlights the lack of protected habitats along most of their migration routes.

scholarly journals Spring Migration Routes of Mallards (Anas platyrhynchos) that Winter in Japan, Determined from Satellite Telemetry

2008 ◽  
Vol 25 (9) ◽  
pp. 875-881 ◽  
Author(s):  
Noriyuki Yamaguchi ◽  
Emiko Hiraoka ◽  
Masaki Fujita ◽  
Naoya Hijikata ◽  
Mutsuyuki Ueta ◽  
...  
Keyword(s):  
Anas Platyrhynchos ◽  
Satellite Telemetry ◽  
Spring Migration ◽  
Migration Routes

scholarly journals Seasonal dispersal and longitudinal migration in the Relict Gull Larus relictus across the Inner-Mongolian Plateau

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3380 ◽  
Author(s):  
Dongping Liu ◽  
Guogang Zhang ◽  
Hongxing Jiang ◽  
Lixia Chen ◽  
Derong Meng ◽  
...  
Keyword(s):  
Eastern China ◽  
Local Environment ◽  
Northern China ◽  
Breeding Habitat ◽  
Laizhou Bay ◽  
Bohai Bay ◽  
Migration Routes ◽  
Wintering Grounds ◽  
Stopover Sites ◽  
High Flexibility

The Relict Gull Larus relictus is a globally vulnerable species and one of the least known birds, so understanding its seasonal movements and migration will facilitate the development of effective conservation plans for its protection. We repeatedly satellite-tracked 11 adult Relict Gulls from the Ordos sub-population in Hongjian Nur, China, over 33 migration seasons and conducted extensive ground surveys. Relict Gulls traveled ∼800 km between Hongjian Nur in northern China to the coast of eastern China in a predominantly longitudinal migration, following a clockwise loop migration pattern. The gulls migrated faster in spring (4 ± 2 d) than in autumn (15 ± 13 d) due to a time-minimization strategy for breeding, and they showed considerable between-individual variation in the timing of the autumn migration, probably due to differences in the timing of breeding. Gulls that made at least two round trips exhibited high flexibility in spring migration timing, suggesting a stronger influence of local environment conditions over endogenous controls. There was also high route flexibility among different years, probably due to variations in meteorological or habitat conditions at stopover sites. Relict Gulls stayed for a remarkably long time (234 ± 17 d) on their major wintering grounds in Bohai Bay and Laizhou Bay, between which there were notable dispersals. Pre-breeding dispersals away from the breeding area were distinct, which seemed to be a strategy to cope with the degradation of breeding habitat at Hongjian Nur. Overwhelming lake shrinkage on the breeding ground and at stopover sites and loss of intertidal flats on the wintering grounds are regarded as the main threats to Relict Gulls. It is crucial to make protection administrations aware of the great significance of key sites along migration routes and to promote the establishment of protected areas in these regions.

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