Do migrating White-crested Elaenia,<i>Elaenia albiceps chilensis</i>, use stop-over sites<i>en route</i>to their breeding areas? Evidence from the central Monte desert, Argentina

Cueto, Víctor R.; Sagario, M. Cecilia; Casenave, Javier Lopez de

doi:10.1071/mu15078

Cited by 7 publications

(6 citation statements)

References 15 publications

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“…After those stops in northern Chile, birds moved quickly to their breeding area in the Patagonian forest. This pattern is concordant with the fast movement of elaenias across the Monte desert [ 53 ].…”

Section: Discussionsupporting

confidence: 71%

Migratory timing, rate, routes and wintering areas of White-crested Elaenia (Elaenia albiceps chilensis), a key seed disperser for Patagonian forest regeneration

2017

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Migratory animals often play key ecological roles within the communities they visit throughout their annual journeys. As a consequence of the links between biomes mediated by migrants, changes in one biome could affect remote areas in unpredictable ways. Migratory routes and timing of most Neotropical austral migrants, which breed at south temperate latitudes of South America and overwinter closer to or within tropical latitudes of South America, have yet to be described in detail. As a result, our understanding about how these birds provide links between South American biomes is almost non-existent. White-crested Elaenia (Elaenia albiceps chilensis) is a long-distance austral migrant that breeds in the Patagonian Forest biome and overwinters in tropical South America. Because this small flycatcher plays a key role in the regeneration of this ecosystem, our objective was to describe the annual cycle of White-crested elaenias to evaluate the degree of migratory connectivity between breeding and wintering areas and therefore to determine if there are specific biomes of northern South America linked by elaenias to Patagonian forests. Fifteen individuals were successfully tracked throughout a complete migration cycle using miniature light-level geolocators. All individuals resided and moved through the same general regions. During fall (March-April-May), elaenias were located in the Caatinga and the Atlantic Forest biomes, from Rio de Janeiro to the region near Salvador da Bahia, Brazil. During winter (June-July-Aug.), birds were located further inland, within the Cerrado biome. Birds used three different routes during fall migration. Our results indicate that some individuals use a direct route, flying between 500–600 km/day, crossing desert and grasslands, while others took a detour, flying 100–200 km/day through forested areas with refueling opportunities. All birds used the Yunga forest during spring migration, with ten out of 15 individuals showing a clear counterclockwise loop trajectories throughout their annual cycle. None of the elaenias passed through Amazonia, traveled to western South America or crossed the Equator. Eleanias exhibited a high migratory connectivity between breeding area in Patagonian Forests and winter areas, Atlantic Forest and Cerrado. Our results suggest that Patagonian Forests could be strongly impacted by changes in those biomes or in the Yungas.

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Section: Discussionsupporting

confidence: 71%

Migratory timing, rate, routes and wintering areas of White-crested Elaenia (Elaenia albiceps chilensis), a key seed disperser for Patagonian forest regeneration

2017

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“…The migration southwards seems to follow a diffuse route from the Amazon to Central Brazil (Marini & Cavalcanti, 1990). West-central Argentina (e.g., Mendoza and San Juan Provinces) also seems to be part of a spring migration route to Patagonia (Cueto et al, 2016), and this species reaches its breeding sites in Patagonia in mid-October (Brown et al, 2007). Geolocation data (Jiménez et al, 2016) suggested that three individuals banded on Navarino Island in Tierra del Fuego migrated north at the end of February along the eastern coast of South America, stopped for around 10 days on the eastern coast of Brazil, before flying west to wintering grounds in east-central Amazonia, where they arrived between late April and early June.…”

Section: Tyrannidaementioning

confidence: 99%

An overview of migratory birds in Brazil

et al. 2018

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We reviewed the occurrences and distributional patterns of migratory species of birds in Brazil. A species was classified as migratory when at least part of its population performs cyclical, seasonal movements with high fidelity to its breeding grounds. Of the 1,919 species of birds recorded in Brazil, 198 (10.3%) are migratory. Of these, 127 (64%) were classified as Migratory and 71 (36%) as Partially Migratory. A few species (83; 4.3%) were classified as Vagrant and eight (0,4%) species could not be defined due to limited information available, or due to conflicting data.

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“…Migrating Chilean Elaenias stopover for only a short time during day-light hours for feeding and resting, which might not provide sufficient time to be exposed to local vectors (e.g., crepuscular or nocturnal vector species). This behaviour, based on mist net capture rates in Serra do Mar might prevent individual birds from acquiring local haemosporidian lineages during fall migration (seeCueto et al, 2016 for the same refuelling behaviour during spring migration in Argentina). Moreover, the absence of transmissive stages visualized in blood smears during the stopover in Serra do Mar suggest that Chilean Elaenias migrate carrying a rather low abundance of Leucocytozoon parasites.…”

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Beta diversity, prevalence, and specificity of avian haemosporidian parasites throughout the annual cycle of Chilean Elaenia (Elaenia chilensis), a Neotropical austral migrant

et al. 2022

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Migratory birds are implicated in dispersing haemosporidian parasites over great geographic distances. However, their role in sharing these vector-transmitted blood parasites with resident avian host species along their migration flyway is not well understood. We studied avian haemosporidian parasites in 10 localities where Chilean Elaenia, a long-distance Neotropical austral migrant species, spends part of its annual cycle to determine local parasite transmission among resident sympatric host species in the elaenia's distributional range across South America. We sampled 371 Chilean Elaenias and 1,818 birds representing 243 additional sympatric species from Brazilian wintering grounds to Argentinian breeding grounds. The 23 haemosporidian lineages found in Chilean Elaenias exhibited considerable variation in distribution, specialization, and turnover across the 10 avian communities in South America. Parasite lineage dissimilarity increased with geographic distance, and infection probability by Parahaemoproteus decreased in localities harbouring a more diverse haemosporidian fauna. Furthermore, blood smears from migrating Chilean Elaenias and local resident avian host species did not contain infective stages of Leucocytozoon, suggesting that transmission did not take place in the Brazilian stopover site. Our analyses confirm that this Neotropical austral migrant connects avian host communities and transports haemosporidian parasites along its distributional range in South America. However, the lack of transmissive stages at stopover site and the infrequent parasite lineage sharing between migratory host populations and residents at breeding and wintering grounds suggest that Chilean Elaenias do not play a significant role in dispersing haemosporidian parasites, nor do they influence local transmission across South America.

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Do migrating White-crested Elaenia,Elaenia albiceps chilensis, use stop-over sitesen routeto their breeding areas? Evidence from the central Monte desert, Argentina

Cited by 7 publications

References 15 publications

Migratory timing, rate, routes and wintering areas of White-crested Elaenia (Elaenia albiceps chilensis), a key seed disperser for Patagonian forest regeneration

Migratory timing, rate, routes and wintering areas of White-crested Elaenia (Elaenia albiceps chilensis), a key seed disperser for Patagonian forest regeneration

An overview of migratory birds in Brazil

Beta diversity, prevalence, and specificity of avian haemosporidian parasites throughout the annual cycle of Chilean Elaenia (Elaenia chilensis), a Neotropical austral migrant

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