Barometer logging reveals new dimensions of individual songbird migration

2018 ◽  
Vol 49 (9) ◽  
pp. e01821 ◽  
Author(s):  
Sissel Sjöberg ◽  
Lykke Pedersen ◽  
Gintaras Malmiga ◽  
Thomas Alerstam ◽  
Bengt Hansson ◽  
...  
Keyword(s):  
Songbird Migration

scholarly journals Nocturnal Songbird Migration

Nature ◽  
1971 ◽  
Vol 230 (5296) ◽  
pp. 580-580 ◽  
Author(s):  
S. A. GAUTHREAUX ◽  
K. P. ABLE
Keyword(s):  
Songbird Migration

scholarly journals North on the Wing: Travels with the Songbird Migration of Spring

The Condor ◽  
2018 ◽  
Vol 120 (4) ◽  
pp. 887-888
Author(s):  
David I. King
Keyword(s):  
Songbird Migration

scholarly journals An East-West Comparison of Migration in North American Wood Warblers

The Condor ◽  
2005 ◽  
Vol 107 (2) ◽  
pp. 197-211 ◽  
Author(s):  
Jeffrey F. Kelly ◽  
Richard L. Hutto
Keyword(s):  
Riparian Vegetation ◽  
Large Scale ◽  
Ecological Systems ◽  
Migration Routes ◽  
Stopover Ecology ◽  
Wood Warblers ◽  
Songbird Migration ◽  
Published Research ◽  
Migration Systems ◽  
East West

Abstract That western and eastern songbird migration routes are distinct ecological systems has been proposed for over 100 years. Nonetheless, this distinction has not been widely recognized nor have there been any comparative studies that quantitatively evaluate the differences and similarities between western and eastern songbird migration systems. We drew from previously published research on wood warblers to highlight patterns in stopover ecology that suggest fundamental differences between western and eastern migrants. In particular, we compared biogeography, evolutionary relationships, and stopover ecology of wood warblers from western and eastern North America and found: (1) multiple lines of evidence that indicate western wood warblers are geographically isolated from eastern conspecifics or congeners throughout the annual cycle, (2) eastern and western wood warbler taxa are distinct evolutionary units, (3) migrant wood warblers captured in the Southwest tended to carry lower fat loads and be comprised of more after-hatch-year birds than is typical of eastern migrants, (4) frugivory is unknown in wood warblers endemic to the Northwest or Southwest and (5) relative to other regions and seasons, riparian vegetation is heavily used by western wood warblers in the spring. We think that further examination and synthesis of these differences would yield a more mechanistic understanding of Nearctic-Neotropical avian migration. On this basis, we elaborate our view that (1) an improved understanding of western songbird migration ought to be a high priority for science, conservation, and education, and (2) large-scale coordinated research efforts would be the most effective strategy for advancing our knowledge of passerine migration in the West. Una Comparación Este-Oeste de la Migración de las Reinitas de Bosque (Parulidae) de Norte América Resumen. Por más de 100 años se ha propuesto que las rutas de migración de aves paseriformes del este y del oeste son sistemas ecológicos diferentes. Sin embargo, esta distinción no ha sido reconocida ampliamente, ni se han realizado estudios comparativos que evalúen cuantitativamente las diferencias y similitudes entre los sistemas de migración del este y del oeste. Revisamos estudios previamente publicados sobre aves de bosque de la familia Parulidae (Reinitas) para destacar los patrones ecológicos de las paradas migratorias que sugieran diferencias fundamentales entre las aves paseriformes migratorias el este y del oeste. Particularmente, comparamos la biogeografía, las relaciones evolutivas y la ecología de las paradas migratorias de las Reinitas del este y del oeste de Norteamérica y encontramos: (1) múltiples líneas de evidencia que indican que las Reinitas del oeste se encuentran geográficamente aisladas de sus coespecíficos o cogenéricos del este durante todo el ciclo anual, (2) los taxa del este y del oeste son unidades evolutivas independientes, (3) las Reinitas migratorias capturadas en el suroeste tendieron a presentar menores cargas de grasa y una mayor proporción de aves eclosionadas durante el año, que lo es típicamente observado para las aves migratorias del este, (4) la frugivoría no se conoce en las Reinitas endémicas del noroeste o sudoeste y (5) en relación a otras regiones o estaciones, la vegetación riparia es usada intensamente durante la primavera por las Reinitas del oeste. Creemos que estudios adicionales y una síntesis de estas diferencias podrían producir un mejor entendimiento mecanístico de la migración Neártico-Neotropical de aves. Basados en esto, sugerimos que (1) un mejor entendimiento de la migración de aves paserinas del oeste debería tener alta prioridad para la ciencia, conservación y educación y (2) que los esfuerzos de investigación coordinados a gran escala serían la estrategia más efectiva para progresar en nuestro conocimiento sobre la migración de las aves paserinas en el oeste.

Circadian control of nocturnal songbird migration

2011 ◽  
Vol 152 (S1) ◽  
pp. 67-73 ◽  
Author(s):  
Timothy Coppack ◽  
Franz Bairlein
Keyword(s):  
Circadian Control ◽  
Songbird Migration

scholarly journals Songbird migration across the Sahara: the non-stop hypothesis rejected!

2006 ◽  
Vol 274 (1610) ◽  
pp. 735-739 ◽  
Author(s):  
Heiko Schmaljohann ◽  
Felix Liechti ◽  
Bruno Bruderer
Keyword(s):  
Energy Loss ◽  
High Temperatures ◽  
Bird Migration ◽  
Autumn Migration ◽  
Night Time ◽  
Western Sahara ◽  
The World ◽  
Intermittent Flight ◽  
Western Palaearctic ◽  
Songbird Migration

Billions of songbirds breeding in the Western Palaearctic cross the largest desert of the world, the Sahara, twice a year. While crossing Europe, the vast majority use an intermittent flight strategy, i.e. fly at night and rest or feed during the day. However, it was long assumed that they overcome the Sahara in a 40 h non-stop flight. In this study, we observed bird migration with radar in the plain sand desert of the Western Sahara (Mauritania) during autumn and spring migration and revealed a clear prevalence of intermittent migration. Massive departures of songbirds just after sunset independent of site and season suggests strongly that songbirds spent the day in the plain desert. Thus, most songbirds cross the Sahara predominately by the intermittent flight strategy. Autumn migration took place mainly at low altitudes with high temperatures, its density decreased abruptly before sunrise, followed by very little daytime migration. Migration was highly restricted to night-time and matched perfectly the intermittent flight strategy. However, in spring, when migratory flights occurred at much higher altitudes than in autumn, in cool air, about 17% of the songbird migration occurred during the day. This suggests that flying in high temperatures and turbulent air, as is the case in autumn, may lead to an increase in water and/or energy loss and may prevent songbirds from prolonged flights into the day.

scholarly journals Effects of post-breeding moult and energetic condition on timing of songbird migration into the tropics

2010 ◽  
Vol 278 (1702) ◽  
pp. 131-137 ◽  
Author(s):  
Bridget J. M. Stutchbury ◽  
Elizabeth A. Gow ◽  
Tyler Done ◽  
Maggie MacPherson ◽  
James W. Fox ◽  
...  
Keyword(s):  
Light Level ◽  
Hylocichla Mustelina ◽  
Energetic Condition ◽  
Territory Acquisition ◽  
Breeding Grounds ◽  
High Reproductive Effort ◽  
Carry Over ◽  
The Tropics ◽  
Songbird Migration ◽  
Wood Thrushes

Each autumn billions of songbirds migrate between the temperate zone and tropics, but little is known about how events on the breeding grounds affect migration to the tropics. Here, we use light level geolocators to track the autumn migration of wood thrushes Hylocichla mustelina and test for the first time if late moult and poor physiological condition prior to migration delays arrival on the winter territory. Late nesting thrushes postponed feather moult, and birds with less advanced moult in August were significantly farther north on 10 October while en route to the tropics. Individuals in relatively poor energetic condition in August (high β-Hydroxybutyrate, low triglyceride, narrow feather growth bars) passed into the tropics significantly later in October. However, late moult and poor pre-migratory condition did not result in late arrival on the winter territory because stopover duration was highly variable late in migration. Although carry-over effects from the winter territory to spring migration may be strong in migratory songbirds, our study suggests that high reproductive effort late in the season does not impose time constraints that delay winter territory acquisition.

Wind and the Direction of Nocturnal Songbird Migration

Nature ◽  
1970 ◽  
Vol 228 (5270) ◽  
pp. 476-477 ◽  
Author(s):  
S. A. GAUTHREAUX ◽  
K. P. ABLE
Keyword(s):  
Songbird Migration

Tracking mated pairs in a long-distance migratory songbird: migration schedules are not synchronized within pairs

2016 ◽  
Vol 114 ◽  
pp. 63-68 ◽  
Author(s):  
Bridget J.M. Stutchbury ◽  
Kevin C. Fraser ◽  
Cassandra Silverio ◽  
Patrick Kramer ◽  
Bob Aeppli ◽  
...  
Keyword(s):  
Long Distance ◽  
Migratory Songbird ◽  
Songbird Migration

Combining direct and indirect tracking techniques to assess the impact of sub-Saharan conditions on cross-continental songbird migration

2016 ◽  
Vol 157 (4) ◽  
pp. 1037-1047 ◽  
Author(s):  
Lykke Pedersen ◽  
Kevin C. Fraser ◽  
T. Kurt Kyser ◽  
Anders P. Tøttrup
Keyword(s):  
Sub Saharan ◽  
Songbird Migration ◽  
The Impact
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