Bird number dynamics during the post-breeding period at the Tömörd Bird Ringing Station, western Hungary

Gyurácz, József; Bánhidi, Péter; Góczán, József; Illéš, Peter; Kalmár, Sándor; Koszorús, Péter; Lukács, Zoltán; Németh, Csaba; Varga, László

doi:10.1515/ring-2017-0002

Cited by 8 publications

(8 citation statements)

References 29 publications

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“…Differences in the observer effort notwithstanding, records of YBW in the Iberian Peninsula were under 1% of those recorded in United Kingdom, and under 8% of those in both Sweden and France, but even here a 2–3 fold increase has been documented in the last 10 years [ 92 ]. In Hungary, Romania and Bulgaria, which sit much closer to the Siberian breeding grounds of the YBW but considerably further south than the aforementioned countries, there are only a handful of records (Hungary: 6 [ 93 ]; Romania: 10 [ 94 ]; Bulgaria: 5 [ 95 ]), most of which come from ringing records, as opposed to observations.…”

Section: Temporal and Spatial Patterns Of Occurrence Of Ybw In Europementioning

confidence: 99%

The Yellow-browed Warbler (Phylloscopus inornatus) as a model to understand vagrancy and its potential for the evolution of new migration routes

Dufour

Åkesson

Hellström³

et al. 2022

Mov Ecol

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Why and how new migration routes emerge remain fundamental questions in ecology, particularly in the context of current global changes. In its early stages, when few individuals are involved, the evolution of new migration routes can be easily confused with vagrancy, i.e. the occurrence of individuals outside their regular breeding, non-breeding or migratory distribution ranges. Yet, vagrancy can in theory generate new migration routes if vagrants survive, return to their breeding grounds and transfer their new migration route to their offspring, thus increasing a new migratory phenotype in the population. Here, we review the conceptual framework and empirical challenges of distinguishing regular migration from vagrancy in small obligate migratory passerines and explain how this can inform our understanding of migration evolution. For this purpose, we use the Yellow-browed Warbler (Phylloscopus inornatus) as a case study. This Siberian species normally winters in southern Asia and its recent increase in occurrence in Western Europe has become a prominent evolutionary puzzle. We first review and discuss available evidence suggesting that the species is still mostly a vagrant in Western Europe but might be establishing a new migration route initiated by vagrants. We then list possible empirical approaches to check if some individuals really undertake regular migratory movements between Western Europe and Siberia, which would make this species an ideal model for studying the links between vagrancy and the emergence of new migratory routes.

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Section: Temporal and Spatial Patterns Of Occurrence Of Ybw In Europementioning

confidence: 99%

The Yellow-browed Warbler (Phylloscopus inornatus) as a model to understand vagrancy and its potential for the evolution of new migration routes

Dufour

Åkesson

Hellström³

et al. 2022

Mov Ecol

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“…However, the annual captures did not show a linear trend between 1998 and 2021, but fluctuated, being very high in a few years for Blue Tit, 2010. In these invasion years, the most birds were captured primarily in the second half of the autumn migration (Gyurácz et al 2017). The temporal variation of annual captures and the annual capturerecapture proportions of ages and sexes of the closely-related tit species were similar.…”

Section: Discussionmentioning

confidence: 87%

“…The nets were placed evenly in the four habitat types. Ringing sessions lasted from sunrise to noon (CES) or dusk, except on rainy and stormy days when the nets were closed; numbers, locations, types, and lengths of mist nets were held constant (Gyurácz et al 2017). All birds were ringed, sexed and aged according to Svensson (1992).…”

Section: Study Area and Data Collectionmentioning

confidence: 99%

“…As part of a long-term monitoring study to understand passerines' population dynamics and migration (Gyurácz & Bánhidi 2008, Lukács et al 2015), here we report annual capture-recapture data, and estimate age-and sex-specific survival for one Palearctic and one European cavity-nesting and partial-migrant species of tits: Blue Tit Cyanistes caeruleus and Great Tit Parus major breed and migrate sympatrically in western Hungary (Gyurácz et al 2017). The European breeding populations of Great Tit and Blue Tit appear to have increased moderately in recent decades (PECBMS 2021).…”

Section: Introductionmentioning

confidence: 99%

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Annual captures and low apparent survival rates in two tit species in western Hungary

Gyurácz

Bánhidi²,

Góczán³

et al. 2022

Ornis Hungarica

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Adult and juvenile survival are important factors affecting the population dynamics of small passerines. Understanding variation in the population dynamics and survival rates is critical for ecological studies and nature conservation. The aim of this study was to investigate the annual capture-recapture, apparent survival and capture probabilities of the Blue Tit Cyanistes caeruleus and the Great Tit Parus major occurring in western Hungary. Data from 8,628 Blue Tits and 7,727 Great Tits came from a constant-effort ringing scheme, using three ringing periods, spanning 24 years (1998 to 2021). The annual captures did not show a significant linear trend from 1998 to 2021 in the study site for both tit species. The temporal variation of annual captures and the annual capture-recapture proportions of different ages and sexes of the tit species were similar. This indicated that the migration strategies of these two partial migrant species did not differ significantly. According to the best standard Cormack-Jolly-Seber model, apparent survival of first-year birds was lower than that for adults. The CJS model selection for the dataset indicated that the time and sex had no effect on apparent survival probabilities for both tit species. Capture probability in the juvenile groups was not significantly higher than that in the adult groups for both species.

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“…In addition to the field observation data, we also used ringing data from 3 Actio Hungarica camps (Szalonna, Tömörd, Ócsa) in our analysis. For descriptions of the three sites and the ringing work see Farkas et al (2014), Csörgő et al (2016) and Gyurácz et al (2017). When defining migration periods, only new ringings were considered, not recaptures (Szalonna: 920, Tömörd: 768, Ócsa: 167 individuals).…”

Section: Methodsmentioning

confidence: 99%

Migration of Firecrest (Regulus ignicapilla) in Hungary

Bozó

Csathó²,

Gyurácz

et al. 2021

Ornis Hungarica

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The Firecrest (Regulus ignicapilla) is a regular, but small-number breeder in spruce and coniferous forests in the mountainous and hilly areas of Hungary, but is found in all parts of the country during migration. Despite this, only sporadic field observation data and ringing results in Western Hungary have been published so far. The aim of this study was to investigate the migration of this species on a national scale. In our work, we processed field observation data collected on the Csanádi-hát and capture-recapture data from three bird ringing stations (Szalonna, Tömörd and Ócsa) from the second half of the 1980s to 2021. We also used archive published field observation data from different parts of Hungary. Our results show that the spring migration of the species in the study areas took place between mid-March and late April – early May, and its timing did not differ significantly between regions. In contrast, the autumn migration was earlier in mountainous areas than in lowland areas. The small numbers and short duration of recaptured birds suggested a rapid migration in both periods. In autumn, we obtained a significant difference between the annual number of birds captured in Tömörd and Szalonna. In both periods, males were caught in greater numbers than females. In southern Hungary, the timing of migration in spring has not changed, but in autumn the species migrated earlier than a few decades ago.

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Bird number dynamics during the post-breeding period at the Tömörd Bird Ringing Station, western Hungary

Cited by 8 publications

References 29 publications

The Yellow-browed Warbler (Phylloscopus inornatus) as a model to understand vagrancy and its potential for the evolution of new migration routes

The Yellow-browed Warbler (Phylloscopus inornatus) as a model to understand vagrancy and its potential for the evolution of new migration routes

Annual captures and low apparent survival rates in two tit species in western Hungary

Migration of Firecrest (Regulus ignicapilla) in Hungary

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