Black storks - migration

[marika.solo]

Black storks - migration paths


PIC https://schwarzstorchberingung.de/attac ... ugwege.jpg (source: https://schwarzstorchberingung.de/page11.php)


source: Janssen, Gerd; Hormann, Martin; Rohde, Carsten: Der Schwarzstorch. Ciconia nigra. Unter Mitarbeit von Alfred Nottorf und Eberhard Mey, mit einem Vorwort von Thomas Krauß. Hohenwarsleben,Westarp Wissenschaften, 2004. 414 S. Ill. (Die Neue Brehm-Bücherei, 468). Fr. 52.30; I 29.95. ISBN 3-89432-219-5., Gesnerus, 62(3-4), 339-340.
pic also here https://upload.wikimedia.org/wikipedia/ ... ration.png


source: Tamás, E. A. 2012. Breeding and Migration of the Black Stork (Ciconia nigra), with Special Regard to a Central European Population and the Impact of Hydro-Meteorogical Factors and Wetlands Status. PhD Thesis, University of Debrecen, Debrecen, Hungary. 146 pp.
pic. https://dea.lib.unideb.hu/dea/bitstream ... sAllowed=y, p. 79 (91 in the file)

[Madli]

Migration of Black Storks Ciconia nigra at a migratory divide: two different routes used by siblings from one nest and two different routes used by one individual

Black Storks Ciconia nigra breeding in Europe use two main migratory routes to winter in Africa: a western route over Gibraltar and an eastern route through Turkey and Israel. A broad area of migratory divide exists in central Europe. We examined cases from the Czech Republic wherein siblings from one nest used different migration routes. We found 20 such cases associated with 18 nests distributed throughout the entire territory of the Czech Republic. Moreover, one bird hatched in 2007 used the western migration route in 2007 and the eastern one in 2009. The actual geographical position of a juvenile Black Stork from an area of migratory divide in the autumn period of migratory restlessness (after the dispersal period) influences the decision to choose the western or eastern direction of migration. We also propose that Black Storks that are older than one year and therefore with experience of past migrations could decide their direction of autumn migration and be followed by inexperienced juvenile Black Storks. Siblings originating from an area of migratory divide can commonly use both main migration routes.

Literák, I., Kafka, P., Vrána, J., & Pojer, F. (2017). Migration of Black Storks Ciconia nigra at a migratory divide: two different routes used by siblings from one nest and two different routes used by one individual. Ringing & Migration, 32(1), 19–24. https://doi.org/10.1080/03078698.2017.1332260

[marika.solo]

Migration of juvenile Black Storks: stay with the family or go alone?

Abstract:
For many migratory species, social interactions on migration are poorly known, particularly the extent to which brood siblings remain together, at least during their first post-fledging migration. This study tested the assumption that Black Stork siblings stay together during migration and is the first time that juveniles from the same brood of a Palearctic sub-Saharan migratory stork species have been tracked on migration. Four juveniles from the same brood were followed by satellite tracking, and each dispersed or migrated in a completely different direction to its siblings. The results thus refute the idea that Black Stork siblings remain together on their first migration, but to confirm these new findings, it is important to repeat the study using additional nests.

Larue, M., Boos, M., Brossard, C., Baillon, F., Boutteaux, J.-J., Bernard, J., Brossault, P., Petit, O., & Chevallier, D. (2016). Migration of juvenile Black Storks: stay with the family or go alone? Ringing & Migration, 31(1), 74–76. doi.org/10.1080/03078698.2016.1190616

[marika.solo]

WHITE STORKS (!)

Causes and consequences of facultative sea crossing in a soaring migrant.

1. Studying the causes and consequences of route selection in animal migration is important for understanding the evolution of migratory systems and how they may be affected by environmental factors at various spatial and temporal scales. One key decision during migration is whether to cross 'high transport cost' areas or to circumvent them. Soaring birds may face this choice when encountering water-bodies where convective updrafts are weak or scarce. Crossing these water-bodies requires flying using energetically costly flapping flight, while circumventing them over land permits energetically cheap soaring.
2. We tested how several atmospheric factors (e.g. wind, thermal uplift) and geographic , seasonal and state-related factors (sex and age) affected route selection in migrating white storks Ciconia ciconia. We used 196 GPS tracks of 70 individuals either crossing or circumventing the north-easternmost section of the Mediterranean Sea, over Iskenderun Bay in southern Turkey.
3. We found that westward and southward winds promoted a cross-bay journey in spring and autumn, respectively, acting as tailwinds. Also, overall weaker winds promoted a sea crossing in spring. Sea crossing was associated with flapping flight and higher values of overall dynamic body acceleration and resulted in higher ground speed than travel over land.
4. The combined environmental conditions and the effects of route selection on movement-related energy costs and speed were likely responsible for an increase in the time spent flying and distance travelled of migrating storks that decided to cross the bay during spring. Notably, daily travel distances of spring migrants crossing the bay were 60 km longer than those of land-detouring birds, allowing them to reach their destination faster but likely incurring a higher energetic flight cost. No such benefit was found during autumn.

Paolo Becciu, Rotics, S., Horvitz, N., Kaatz, M., Fiedler, W., Zurell, D., Flack, A., Florian Jeltsch, Wikelski, M., Nathan, R., & Sapir, N. (2020). Causes and consequences of facultative sea crossing in a soaring migrant. Functional Ecology, 34(4), 840–852. https://doi.org/10.1111/1365-2435.13539



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[marika.solo]

Jadoul G, Hourlay F, Toussaint A-C (2003) Suivi de la migration automnale de la Cigogne noire (Ciconia nigra) par télémétrie satellitaire. Aves 40:155–164

Bobek M, Hampl R, Peške L, Pojer F, Šimek J, Bureš S (2008) African Odyssey project - satellite tracking of black storks Ciconia nigra breeding at a migratory divide. J Avian Biol 39:500–506. https://doi.org/10.1111/j.0908-8857.2008.04285.x

Chevallier HY, Georges J-Y, Baillon F, Brossault P, Aurouet A, Le Maho Y, Massemin S (2010a) Influence of weather conditions on the flight of migrating black storks. Proc R Soc B Biol Sci 277:2755–2764. https://doi.org/10.1098/rspb.2010.0422

Chevallier HY, Le Maho Y, Baillon F, Duponnois R, Dieulin C, Brossault P, De Franclieu P, Lorge P, Aurouet A, Massemin S (2010b) Human activity and the drying up of rivers determine abundance and spatial distribution of Black Storks Ciconia nigra on their wintering grounds. Bird Study 57:369–380. https://doi.org/10.1080/00063651003678467

Chevallier HY, Le Maho Y, Brossault P, Baillon F, Massemin S (2011) The use of stopover sites by Black Storks (Ciconia nigra) migrating between West Europe and West Africa as revealed by satellite telemetry. J Ornithol 152:1–13. https://doi.org/10.1007/s10336-010-0536-6

Cano LS, Tellería JL (2013) Migration and winter distribution of Iberian and central European black storks Ciconia nigra moving to Africa across the Strait of Gibraltar: a comparative study. J Avian Biol 44:189–197. https://doi.org/10.1111/j.1600-048X.2012.05824.x

Chevallier, D., Baillon, F., Le Maho, Y., Blanc, S., Brossault, P., & Massemin, S. (2013). Importance of the connectivity of Spanish stopovers for Black Storks. Bird Study, 60(4), 550–554. https://doi.org/10.1080/00063657.2013.851643

[marika.solo]

2024

Influence of age on spatial and temporal migratory patterns of Black Storks from Germany.

Abstract

How the migration behavior of long-lived birds develops throughout their life is still a research question in ornithology that is largely unanswered. Here, we analyzed GPS data of 70 juvenile Black Storks during the first 3 years of their migration to determine the influence of age and experience on migration patterns. We focused on the choice of the migration flyway, as well as the movements in the wintering area, and the changes in departure times with increasing age.

Migratory routes of German Black Storks were divided into the western (82% of all tracked individuals) and eastern flyways (16%). The central migratory flyway through Italy or Greece was taken only by two individuals and never repeatedly. In addition, we found that the wintering area decreased by almost 60% during their first 3 years of life. In addition, spring departure dates from the wintering areas also became earlier with increasing age.

However, we did not find changes in departures from the breeding area in autumn. Thus, our study shows that age and migration experiences have a considerable influence on essential migratory decisions in Black Storks. Further, it also demonstrates that older storks rely strongly on previous experiences to perform their migrations efficiently.

Fisel, F., Heine, G., Rohde, C., Wikelski, M., & Flack, A. (2024). Influence of age on spatial and temporal migratory patterns of Black Storks from Germany. Journal of Ornithology, 165(4), 861–868. https://doi.org/10.1007/s10336-024-02170-3

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