Loss and Preservation of Chimney Swift Habitat in Manitoba, 2007-2016

Stewart, Robert E.; Poole, Timothy F.; Artuso, Christian; Stewart, Barbara E.

doi:10.29173/bluejay312

Cited by 3 publications

(5 citation statements)

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“…17 Of the eight remaining sites, four chimneys have been capped, lined or demolished, a rate of decline similar to that identified previously in Manitoba. 4,17 Only four known active chimneys remain in this neighbourhood. While the small number of known sites may be influenced by low volunteer recruitment in the area, low recruitment may reflect a low population of Chimney Swifts.…”

Section: Discussionmentioning

confidence: 99%

“…1 Although breeding and roosting habitat loss is not considered a limiting factor in some regions, evidence from Manitoba and elsewhere suggests that annual loss of occupied habitat is still occurring on the Chimney Swift's nesting grounds. 1,2,3,4 Consequently, replacing demolished, capped or lined chimneys has become a key focus for Chimney Swift conservation in Manitoba. The provincial legislation specifically protects the habitat on which listed species depend for breeding and other key parts of their lifecycle.…”

Section: Introductionmentioning

confidence: 99%

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Possible effects of placement timing on the use of replacement habitat by Chimney Swifts in Manitoba

Poole¹

2023

bluejay

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Possible effects of placement timing on the use of replacement habitat by Chimney Swifts in Manitoba

Poole¹

2023

bluejay

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Possible effects of placement timing on the use of replacement habitat by Chimney Swifts in Manitoba

Poole¹

2022

bluejay

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“…Though the cause(s) behind the population declines is not clear, reductions in the availability of aerial insects for food, as well as destruction of suitable nesting and roosting habitat, are frequently cited as the leading causes of Chimney Swift population declines (e.g., COSEWIC 2007, Nocera et al 2012, Steeves et al 2014. In particular, the availability of porous masonry chimneys that Chimney Swifts typically use for nesting and roosting is declining on account of chimney capping and screening to prevent animal entries, demolition of older buildings for redevelopment, and installation of metal liners and spark arresters for insurance purposes , Stewart et al 2016, Wake 2016. For example, 47 out of 162 (29%) chimneys known to be used by nesting or roosting Chimney Swifts in London, Ontario between 2004 and 2013 were lost by 2015, mainly because of demolition or capping (Wake 2016).…”

Section: Introductionmentioning

confidence: 99%

Timing matters: cloud cover and date influence probability of detecting nesting Chimney Swifts (Chaetura pelagica)

Purves¹,

Falconer²,

Tozer³

et al. 2019

ACE

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One third of bird species in North America need immediate conservation action. Effective management and recovery actions for species of conservation concern require accurate methods of monitoring species occurrence that limit the incidence of nondetection error (when a species is falsely recorded as absent when it is present). The Chimney Swift (Chaetura pelagica) is experiencing widespread population declines in North America, possibly, in part, because chimneys used for nesting or roosting are being capped or demolished. In particular, the presence of nesting swifts in a chimney can be difficult to determine, and thus, it is important to design survey protocols that limit the incidence of nondetection error. Here, we used data from Bird Studies Canada's Citizen Science program, Ontario SwiftWatch, and dynamic occupancy models to examine factors influencing the probability of detecting Chimney Swifts at nest sites. We found that the probability of detecting Chimney Swifts at nest chimneys decreased with increasing cloud cover. We also found some support suggesting that detection increased moderately with date over the course of the nesting period (June-July). Based on our findings, we recommend that surveys aiming to identify Chimney Swift nest sites in southern Ontario, Canada should be conducted for at least one hour under clear skies, and as late in the nesting period as possible. The results of this study will inform survey design to reduce the incidence of false negatives during chimney surveys for nest occupancy, and as a result, help reduce Chimney Swift nesting habitat disturbance and loss. Le choix du moment: la couverture nuageuse et la date ont une influence sur la probabilité de détecter les Martinets ramoneurs nicheursRÉSUMÉ. Un tiers des espèces d'oiseaux d'Amérique du Nord nécessitent des mesures de conservation immédiates. Des mesures efficaces de gestion et de rétablissement des espèces menacées exigent des méthodes précises de surveillance de l'occurrence des espèces qui limitent l'incidence des erreurs de non-détection (lorsqu'une espèce est faussement enregistrée comme étant absente alors qu'elle est présente). Le Martinet ramoneur (Chaetura pelagica) connaît un déclin généralisé de sa population en Amérique du Nord, peutêtre en partie parce que les cheminées utilisées pour la nidification ou le repos sont recouvertes ou démolies. En particulier, la présence de Martinets nicheurs dans une cheminée peut être difficile à déterminer. Il est donc important de concevoir des protocoles de relevé qui limitent l'incidence des erreurs de non-détection. Ici, nous avons utilisé les données du programme de science citoyenne SwiftWatch d'Études d'Oiseaux Canada, Ontario, ainsi que des modèles dynamiques d'occupation pour examiner les facteurs influant sur la probabilité de détecter des Martinets ramoneurs aux sites de nidification. Nous avons constaté que la probabilité de détecter des Martinets ramoneurs près des cheminées utilisées comme nichoir diminuait avec l'augmentation de la couverture nuageuse. N...

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Loss and Preservation of Chimney Swift Habitat in Manitoba, 2007-2016

Cited by 3 publications

References 1 publication

Possible effects of placement timing on the use of replacement habitat by Chimney Swifts in Manitoba

Possible effects of placement timing on the use of replacement habitat by Chimney Swifts in Manitoba

Possible effects of placement timing on the use of replacement habitat by Chimney Swifts in Manitoba

Timing matters: cloud cover and date influence probability of detecting nesting Chimney Swifts (Chaetura pelagica)

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