Use of citizen science to identify factors affecting bird–window collision risk at houses

Kummer, Justine A.; Bayne, Erin M.; Machtans, Craig S.

doi:10.1650/condor-16-26.1

Cited by 34 publications

(42 citation statements)

References 21 publications

(11 reference statements)

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“…The factors affecting carcass survival time are similar to those factors we identified as having a large effect on bird-window collisions (Kummer et al 2016b). This suggests that those homes that are experiencing a large number of collisions are probably experiencing a higher number of scavenging events that need to be corrected for when estimating collision rates.…”

Section: Covariates Affecting Carcass Removalsupporting

confidence: 62%

Use of bird carcass removals by urban scavengers to adjust bird-window collision estimates

Kummer¹,

Nordell²,

Berry³

et al. 2016

ACE

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ABSTRACT. Carcass removal by scavengers has been identified as one of the largest biases in estimating bird mortality from anthropogenic sources. Only two studies have examined carcass removal by scavengers in an urban environment, and previous estimates of bird-window collision mortality at houses have relied on carcass removal rates from wind turbine studies. We placed a bird carcass and time-lapse camera at 44 houses in Edmonton, Alberta. In total, 166 7-day trials were conducted throughout 2015. Time-to-event (survival) analysis was used to identify covariates that affected removal. The carcass removal rate was determined for use in estimating the number of birds killed from bird-window collisions at houses in Alberta. In total, 67.5% of carcasses were removed. The date the carcass was placed, the year the house was built, and the level of development within 50 m of the house were the covariates that had the largest effect on carcass removal. In calculating our removal rate, the number of detected carcasses in the first 24 hours was adjusted by 1.47 to account for removal by scavengers. Previously collected citizen science data were used to create an estimate of 957,440 bird deaths each year in Alberta as a result of bird-window collisions with houses. This number is based on the most detailed bird-window collision study at houses to date and a carcass removal study conducted in the same area. Similar localized studies across Canada will need to be completed to reduce the biases that exist with the previous bird-window collision mortality estimate for houses in Canada. Incorporation du prélèvement de carcasses d'oiseaux par les charognards urbains dans l'estimation du taux de collision des oiseaux avec les fenêtresRÉSUMÉ. Le prélèvement de carcasses par les charognards a été identifié comme un des biais les plus importants dans l'estimation de la mortalité d'oiseaux attribuable à des causes d'origine humaine. Seules deux études ont examiné le prélèvement de carcasses par les charognards en milieu urbain, et les estimations précédentes de la mortalité d'oiseaux par collision avec les fenêtres de maisons ont utilisé des taux de prélèvement de carcasses provenant d'études réalisées pour les éoliennes. Nous avons déposé des carcasses d'oiseaux et positionné des caméras à prises de vues par intervalle à 44 maisons à Edmonton, Alberta. En tout, 166 essais de 7 jours ont été effectués en 2015. Une analyse du temps d'apparition de l'événement (survie) a été faite pour déterminer les covariables qui agissent dans le prélèvement de carcasses. Le taux de prélèvement de carcasses a été établi afin d'être subséquemment utilisé dans l'estimation du nombre d'oiseaux morts par collision avec les fenêtres de maisons en Alberta. Nous avons estimé ce taux à 67,5 %. La date de dépôt de la carcasse, l'année de construction de la maison et le degré d'urbanisation dans un rayon de 50 m de la maison étaient les covariables qui avaient le plus d'effets sur le prélèvement de carcasses. Dans notre calcul du taux de prélèvement, le nom...

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Section: Covariates Affecting Carcass Removalsupporting

confidence: 62%

Use of bird carcass removals by urban scavengers to adjust bird-window collision estimates

Kummer¹,

Nordell²,

Berry³

et al. 2016

ACE

Self Cite

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“…If bird abundance and diversity are correlated with more collisions (Hager et al 2008, Kahle et al 2016) they may be higher in these places. Thus, collisions are more frequent in rural than in urbanized areas (Kummer et al 2016b), and the proximity of glass panes to urban green areas and artificial feeders may also catalyze such accidents (Dunn 1993, Borden et al 2010, Kummer & Bayne 2015.…”

Section: Surroundingsmentioning

confidence: 99%

Main causes of bird-window collisions: a review

Basilio

Moreno

Piratelli

2020

An. Acad. Bras. Ciênc.

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Bird-window collisions are a major cause of bird mortality in the world; up to one billion birds die each year from collisions with glass panes in North America alone.However, relatively little attention had been given to this issue in the broad scientifi c literature, despite a recent increase in the number of papers. In this paper, the indexed literature on bird-window collisions was reviewed, specifi cally addressing the causal factors. The search retrieved 53 papers, mostly from North America. The factors linked to higher collision rates were large areas of continuous glass, the presence of nearby vegetation and feeders, bird migration, abundance, and behavior. Several factors were site-specifi c, preventing the global extrapolation of these fi ndings. There is a lack of scientifi c knowledge regarding bird-window collisions in tropical countries. One of the challenges to mitigating this problem is the small amount of information andfrequently -the extrapolation of fi ndings described for temperate regions to other areas.There is a need for a greater and urgent effort to fi ll this gap.LGB and AJP conceived the idea designed the studies; LGB, DJM and AJP collected and analyzed data; all the authors wrote the manuscript and approved the final version.

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“…In North America, citizen scientists have proven to be strong allies in estimating the number of bird-window collisions (Machtans and Thogmartin 2014, Loss et al 2015, Kummer et al 2016a. We therefore recommend undertaking similar efforts in Latin America and that nationwide data on bird-window collisions be gathered in Brazil to develop effective public policies in urban management.…”

Section: Speciesmentioning

confidence: 99%

Relationship between bird-of-prey decals and bird-window collisions on a Brazilian university campus

Brisque¹,

Campos-Silva²,

Piratelli³

2017

Zoologia

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ABSTRACT. Bird-window collisions are a dramatic cause of bird mortality globally. In Latin America, statistics are generally very scarce and/or inaccessible so the frequency of such incidents is still poorly understood. Nevertheless, civilians have applied preventive methods (e.g. adhesive bird-of-prey decals) sparsely but, to our knowledge, no study has evaluated their effectiveness in Brazil. Here, we estimated the mortality rate of bird-window collisions and tested the effectiveness of bird-of-prey decals at preventing such accidents. We undertook daily searches for bird carcasses, presumably resulting from window collisions, near all buildings on a university campus over seven months. Adhesive bird-of-prey decals were then applied to the two buildings with the highest mortality rates and surveys continued for over 12 more months. The mortality rates before and after the application of decals and between seasons were then compared using Friedman test. We recorded 36 collisions, 29 around the two buildings with the highest collision rates 19 prior and 10 after our intervention with associated collision rates of 0.08 and 0.04 collisions/day. Although mortality was reduced by almost half, this difference was not statistically significant. The Blue-black grassquit, Volatinia jacarina (Linnaeus, 1766), and Ruddy ground dove, Columbina talpacoti (Temminck, 1810) suffered the highest number of collisions, followed by the Rufous-collared sparrow, Zonotrichia capensis (P. L. Statius Müller, 1776). Our bird-of-prey decals and efforts were insufficient to prevent or dramatically reduce the number of bird-window collisions. Therefore, we recommend that different interventions be used and additional longterm studies undertaken on their efficacy.

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Use of citizen science to identify factors affecting bird–window collision risk at houses

Cited by 34 publications

References 21 publications

Use of bird carcass removals by urban scavengers to adjust bird-window collision estimates

Use of bird carcass removals by urban scavengers to adjust bird-window collision estimates

Main causes of bird-window collisions: a review

Relationship between bird-of-prey decals and bird-window collisions on a Brazilian university campus

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