Seasonal differences in migration strategies of Red Kites (Milvus milvus) wintering in Spain

AbstractRed Kite shows a great variability in its migration strategies: most individuals in north-eastern Europe are migrants, but there is also a growing number of sedentary individuals. Here, we tagged 49 Red Kites wintering in Spain with GPS/satellite transmitters between 2013 and 2020 to study the autumn and spring migration between the breeding or summering areas in Central Europe and the wintering quarters in Spain. In first place, differences between immatures and adults were found for spring migration. Adults began the spring migration towards the northeast in February–March while the immature individuals began to migrate significantly later and showing a wider date range (February-June). Adults also takes significantly less days to arrive at their destinations (12 ± 5 days) and cover more distance per day (134.2 ± 37.1 km/day) than immatures (19 ± 11 days and 98.9 ± 21.2 km/day). In second place, we also found differences between spring and autumn migration (excluding immatures). Spring migrations were clearly faster and with less stopovers days than autumn migrations. Autumn migration began between mid-October and late November and two different behaviours were observed: most birds made a quick migration direct to the wintering areas with only some days of stopovers, but others prolonged the migration with long stops along the route. These results highlight a great variation in the migratory movements of Red Kite, not only according to age but also between individuals and seasons.

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Migration Strategies of Common Buzzard (Buteo buteo Linnaeus, 1758) in Dobruja

Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” ◽

10.1515/travmu-2017-0008 ◽

2017 ◽

Vol 60 (2) ◽

pp. 537-545

Author(s):

Cătălin-Răzvan Stanciu ◽

Răzvan Zaharia ◽

Gabriel-Bogdan Chişamera ◽

Ioana Cobzaru ◽

Viorel-Dumitru Gavril ◽

...

Keyword(s):

Spring Migration ◽

Autumn Migration ◽

Migration Behavior ◽

Significant Activity ◽

Long Distance ◽

Common Buzzard ◽

Time Period ◽

Migration Strategies ◽

The Common ◽

Vantage Points

Abstract We studied various aspects regarding migration behavior of the Common Buzzard for two subspecies (B. b. buteo and B. b. vulpinus) transiting the region which overlaps with the Western Black Sea Corridor. Using vantage points set across Dobruja we managed to count 2,662 individuals. We highlighted the seasonal and diurnal peak passage, flight directions and height of flight for each season. Our results suggest that 57% of the counted individuals belongs to long-distance migrant Steppe Buzzard - B. b. vulpinus. The peek passage period in autumn migration was reached between the 26th of September to the 6th of October, while for the spring migration peek passage remained uncertain. The main autumn passage direction was from N to S, and NNW to SSE but also from NE to SW. For spring passage the main direction was from S to N but also from ESE to WNW. Flight height during autumn migration was mostly at high altitude while in spring migration was more evenly distributed. The most significant activity was recorded in the second time period, between 10:01 and 13:00 (43%).

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

Ornis Hungarica ◽

10.1515/orhu-2016-0008 ◽

2016 ◽

Vol 24 (1) ◽

pp. 128-149 ◽

Cited By ~ 5

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.

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Autumn Migration of Immature Red Kites Milvus milvus from a Central European Population

Acta Ornithologica ◽

10.3161/00016454ao2019.54.1.004 ◽

2019 ◽

Vol 54 (1) ◽

pp. 45

Author(s):

Grzegorz Maciorowski ◽

Jakub Kosicki ◽

Michał Polakowski ◽

Maria Urbańska ◽

Piotr Zduniak ◽

...

Keyword(s):

European Population ◽

Autumn Migration ◽

Central European ◽

Milvus Milvus ◽

Central European Population

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

Animal Migration ◽

10.1515/ami-2020-0003 ◽

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.

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Occurrence and variability of Panstrongylus lutzi in the State of Ceará, Brazil

Revista da Sociedade Brasileira de Medicina Tropical ◽

10.1590/s0037-86822005000500010 ◽

2005 ◽

Vol 38 (5) ◽

pp. 410-415 ◽

Cited By ~ 10

Author(s):

Maria Hismênia H.M. Garcia ◽

Lindemberg Souza ◽

Rita de Cássia M. de Souza ◽

Alexandre S. Paula ◽

Érika C. Borges ◽

...

Keyword(s):

Trypanosoma Cruzi ◽

Control Programme ◽

Great Variability ◽

Infection Rates ◽

Adult Females ◽

Eastern Brazil ◽

Artificial Environment ◽

High Infection ◽

North Eastern ◽

Hollow Tree

Panstrongylus lutzi is generally restricted to the "caatinga" areas of north-eastern Brazil. Adult insects are frequently found in local houses, but colonies have not previously been registered in the statistics of the Control Programme of Chagas Disease. In Ceará State, our study revealed increasing occurrence of this species, usually with high infection rates for Trypanosoma cruzi, and always represented by adults that invaded the artificial environment. We also found nymphs in the peridomicile and inside the houses. In silvatic habitats we collected two adult females from hollow tree trunks, which may represent an alternative natural ecotope for the species in this state. Panstrongylus lutzi entomological collections from Sobral and Crateús, studied by morphology and morphometrics, showed great variability; those from Crateús were larger smaller and paler in colour, with individuals showing genital features consistent with those described for Panstrongylus lutzi or Panstrongylus sherlocki, whereas those from Sobral were darker and with genitalia compatible with P. sherlocki, nevertheless, all were considered to be Panstrongylus lutzi.

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Avian Scavengers as Bioindicators of Antibiotic Resistance Due to Livestock Farming Intensification

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17103620 ◽

2020 ◽

Vol 17 (10) ◽

pp. 3620

Author(s):

Guillermo Blanco ◽

Luis M. Bautista

Keyword(s):

Bacterial Resistance ◽

Animal Production ◽

Commercial Application ◽

Human Consumption ◽

Antibiotic Residues ◽

Farming Practices ◽

Livestock Farming ◽

Food Animal ◽

Wintering Areas ◽

Milvus Milvus

Industrial food animal production uses huge amounts of antibiotics worldwide. Livestock, their excreta used for manure and meat subproducts not intended for human consumption can all play important roles in the transmission of bacterial resistance to wildlife. Vultures and other scavengers can be directly exposed to active antibiotics ingested while feeding on livestock carcasses. This study evaluates whether bacterial resistance in the red kite (Milvus milvus) differs between two wintering areas selected based on patent differences in farming practices—particularly in the industrial production of food animals (primarily swine and poultry) vs. scarce and declining sheep herding. The results support the hypothesis that intensification in food animal production is associated with increased bacterial multidrug resistance in wildlife. Resistance was positively correlated with time elapsed since the beginning of the commercial application of each antibiotic in human and veterinary medicine, with clear differences depending on farming intensification between areas. Monitoring programs are encouraged to use red kites and other avian scavengers as valuable sentinels of contamination by antibiotics and clinically relevant resistant pathogens from livestock operations of variable intensities. Farms authorized for supplementary feeding of threatened scavengers should avoid supplying carcasses with active antibiotic residues to avoid bacterial resistance in scavenger wildlife.

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Seasonal differences in landbird migration strategies

The Auk ◽

10.1642/auk-16-105.1 ◽

2016 ◽

Vol 133 (4) ◽

pp. 761-769 ◽

Cited By ~ 27

Author(s):

Kyle G. Horton ◽

Benjamin M. Van Doren ◽

Phillip M. Stepanian ◽

Andrew Farnsworth ◽

Jeffrey F. Kelly

Keyword(s):

Seasonal Differences ◽

Migration Strategies

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Autumn Migration Strategies of Reed and Sedge Warblers

Ornis Scandinavica ◽

10.2307/3675898 ◽

1981 ◽

Vol 12 (1) ◽

pp. 1 ◽

Cited By ~ 136

Author(s):

C. J. Bibby ◽

R. E. Green

Keyword(s):

Autumn Migration ◽

Migration Strategies

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Autumn Migration Of The Thrush Nightingale (Luscinia Luscinia) In Northern Hungary

Ring ◽

10.2478/v10050-012-0001-4 ◽

2012 ◽

Vol 34 (1) ◽

pp. 23-36 ◽

Cited By ~ 1

Author(s):

Dávid Kováts

Keyword(s):

Arrival Time ◽

Wing Length ◽

Age Groups ◽

Autumn Migration ◽

Stopover Site ◽

Migration Strategies ◽

Median Date ◽

The Mean ◽

Fat Score ◽

Thrush Nightingale

Abstract Kováts D. 2012. Autumn migration of the Thrush Nightingale (Luscinia luscinia) in northernHungary. Ring 34: 23-36. The autumn migration of the Thrush Nightingale was studied in Szalonna in northern Hungary in 1989-2010. Birds were mist-netted, ringed, aged, measured, weighed and fat scored. In total, 193 Thrush Nightingales were ringed during 22 years. Relations between arrival time and biometrical measurements were determined. Within the study period (6 August - 26 September) the migration curve was bimodal showing maximum on 22 August and 27 August. Immature birds arrived significantly earlier with lower body mass and shorter wing length and had more pointed wings in the first half of their passage. The distribution of fat score classes did not differ significantly between the early and late periods of the most intensive migration, although the mean of the deposited fat was the lowest during the peak of migration. Fat reserve distribution was bimodal in autumn suggesting that Thrush Nightingales probably start their journey from different breeding ranges (populations) or follow still undiscovered migration strategies of sex/age groups. The low proportion of recaptures proved that the area was not used as a stopover site or premigratory fattening area. Within 22 years of study, the median date of autumn migration of Thrush Nightingales shifted 7.9 days earlier, probably due to current climate change.

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