Annual and seasonal trends in the use of garden feeders by birds in winter

Chamberlain, Dan; Vickery, Juliet A.; Glue, David E.; Robinson, Robert A.; Woodburn, Richard J. W.; Cannon, Andrew

doi:10.1111/j.1474-919x.2005.00430.x

Cited by 91 publications

(103 citation statements)

References 13 publications

(13 reference statements)

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“…There were few fatalities during the study, and it is possible the resident species that frequent feeders year-round may be more aware of windows. In addition, although resident species increase their feeder use in the winter (Chamberlain et al 2005), they may no longer have green vegetation reflected in windows to the same degree at this time, reducing their collision risk relative to migrant species. Yearround feeding has been promoted and encouraged to promote conservation, but depending on the home and feeder placement, feeding only during the winter months might be more beneficial to populations and help reduce collisions.…”

Section: Discussionmentioning

confidence: 99%

Bird feeders and their effects on bird-window collisions at residential houses

Kummer¹,

Bayne²

2015

ACE

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ABSTRACT. Feeding wild birds creates an important link between homeowners and conservation. The effects of bird feeders and year-round feeding on birds have not been well studied, however, particularly in relationship to bird-window collisions. We determined effects of bird feeder presence and placement on bird-window collisions at residential homes. Paired month-long trials in which a feeder was either present or absent for one month and then removed or added for the second month were completed at 55 windows at 43 houses. In each trial, homeowners were asked to search their study window daily for evidence of a bird-window collision. During the study there were 51 collisions when there was no bird feeder and 94 when the feeder was present. The season when each trial was set up was the best individual predictor of bird-window collisions. The largest number of collisions was observed during fall migration and the lowest during the winter months. There were no collisions at 26 of the study windows. High variance was observed in the number of collisions at different houses, indicating that effects of bird feeders are context dependent. Changing the occurrence, timing, and placement of feeders can alter collision rates but is only one of many factors that influence whether a residential house is likely to have a bird window-collision or not. Effets des mangeoires sur les collisions d'oiseaux avec les fenêtres de maisonsRÉSUMÉ. Le fait de nourrir les oiseaux sauvages crée un lien important entre les propriétaires de maisons et la conservation. Toutefois, les effets des mangeoires sur les oiseaux et les effets de nourrir les oiseaux à l'année n'ont pas été approfondis, surtout en ce qui a trait aux collisions d'oiseaux avec les fenêtres. Nous avons déterminé les effets de la présence et de l'emplacement de mangeoires sur les collisions d'oiseaux avec les fenêtres de maisons. Des essais appariés d'une durée d'un mois, au cours desquels une mangeoire était soit présente soit absente pour le mois, puis était soit désinstallée soit installée pour le mois suivant, ont été réalisés à 55 fenêtres de 43 maisons. Lors de chaque essai, nous avons demandé aux propriétaires de vérifier quotidiennement la présence d'un indice de collision d'un oiseau avec la fenêtre à l'étude. Dans le cadre de cette recherche, 51 collisions avec une fenêtre sont survenues lorsqu'il n'y avait pas de mangeoires et 94 lorsqu'une mangeoire était installée. La saison de l'essai s'est révélée être la meilleure variable explicative des collisions d'oiseaux avec les fenêtres. Le plus grand nombre de collisions est survenu au cours de la migration automnale, tandis que le plus faible nombre a été observé durant les mois d'hiver. Aucune collision ne s'est produite à 26 fenêtres à l'étude. Nous avons obtenu une variance élevée du nombre de collisions à différentes maisons et ce résultat indique que les effets des mangeoires sont dépendants du contexte. Il est possible de modifier le moment de l'installation des mangeoires, la période durant laquelle celles-ci...

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Section: Discussionmentioning

confidence: 99%

Bird feeders and their effects on bird-window collisions at residential houses

Kummer¹,

Bayne²

2015

ACE

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“…The availability of food can also enhance formation of a new wintering ground, as for the Blackcap wintering in Great Britain, and therefore influence population size (Stafford 1956, Leach 1981, Berthold and Terrill 1988, Berthold et al 1992, Busse 1992, Toms 2002, Chamberlain et al 2005. The Blackcap and also other Sylvia species analysed in this paper are known from annual changes in their food composition.…”

Section: Potential Impact Of Changes On Breeding Groundsmentioning

confidence: 99%

Like a phoenix from the ashes

Zaniewicz

Busse

2010

Ring

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Zaniewicz G., Busse P. 2010. Like a phoenix from the ashes. Ring 32, 1-2: 17-30.From 1967 until 1990, populations of five Sylvia species migrating through the southwestern coast of the Baltic Sea were considerably low and significantly decreasing in the Blackcap (Sylvia atricapilla), Garden Warbler (S. borin) and Barred Warbler (S. nisoria). While after that period a rapid increase in the populations of these migratory species was noted. Similar changes that had started about 1991 were shown by all five Sylvia species. Such coincidence could indicate some common factors acting upon the studied group of migrants at the same time. Apart from a clear increase in the long-term dynamics of the species observed at Bukowo-Kopañ station, the Pearson correlation coefficients of these dynamics calculated for every pair of the analysed Sylvia species in 1967-2006 were high and statistically significant.Based on the distribution of recoveries of the Lesser Whitethroat (S. curruca) we assumed that the main fraction of birds passing the south-western coast of the Baltic Sea originated from the Scandinavian Peninsula. Recent climate changes observed in this area were consistent with the time when the increase in the number of caught birds was noted. Consequently, we suspect that the analysed Sylvia species passing this part of the coast share vast breeding grounds located mainly on the Fennoscandian Peninsula, where their populations are affected by the same common factors.

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“…The GBFS participants (ca 275) have monitored birds visiting gardens where supplementary food is provided since the scheme began in 1970 [19]. Participants recorded the maximum number of each species, including greenfinch, chaffinch and dunnock, observed on a weekly basis for the six-month period October-March.…”

Section: Methods (A) Surveillance For Finch Trichomonosismentioning

confidence: 99%

The emergence and spread of finch trichomonosis in the British Isles

Lawson

Robinson

Colvile

et al. 2012

Phil. Trans. R. Soc. B

Self Cite

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Finch trichomonosis, caused by the protozoal parasite Trichomonas gallinae, was first recognized as an emerging infectious disease of British passerines in 2005. The first year of seasonal epidemic mortality occurred in 2006 with significant declines of greenfinch Carduelis chloris and chaffinch Fringilla coelebs populations. Here, we demonstrate that large-scale mortality, principally of greenfinch, continued in subsequent years, 2007 -2009, with a shifting geographical distribution across the British Isles over time. Consequent to the emergence of finch trichomonosis, the breeding greenfinch population in Great Britain has declined from ca 4.3 million to ca 2.8 million birds and the maximum mean number of greenfinches (a proxy for flock size) visiting gardens has declined by 50 per cent. The annual rate of decline of the breeding greenfinch population within England has exceeded 7 per cent since the initial epidemic. Although initially chaffinch populations were regionally diminished by the disease, this has not continued. Retrospective analyses of disease surveillance data showed a rapid, widespread emergence of finch trichomonosis across Great Britain in 2005 and we hypothesize that the disease emerged by T. gallinae jumping from columbiforms to passeriforms. Further investigation is required to determine the continuing impact of finch trichomonosis and to develop our understanding of how protozoal diseases jump host species.

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Annual and seasonal trends in the use of garden feeders by birds in winter

Cited by 91 publications

References 13 publications

Bird feeders and their effects on bird-window collisions at residential houses

Bird feeders and their effects on bird-window collisions at residential houses

Like a phoenix from the ashes

The emergence and spread of finch trichomonosis in the British Isles

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