Swainson's Thrush (Catharus ustulatus)

Mack, Diane Evans; Yong, Wang

doi:10.2173/bna.540

Cited by 31 publications

(28 citation statements)

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“…Palm Warbler were primarily found in stagnant black spruce and tamarack forests, which is consistent with our predictions and with many habitat descriptions (Niemi and Hanowski 1984, Warner and Wells 1984, Wilson 2013, although lower basal area was not included in any of our models (Wilson 2013). Swainson's Thrush was associated with mature cedar forests and not with black spruce or tamarack, which is consistent with other habitat descriptions (Warner and Wells 1984, Thompson et al 1993, Mack and Yong 2000, Niemi et al 2016. The high level of predictability of our modeling approach and the performance of models for these test species (96% and 60% correctly predicted for Palm Warbler and Swainson's Thrush, respectively) support the use of this approach in determining species' habitat associations within lowland conifer forests of the ALS.…”

Section: Model Evaluationsupporting

confidence: 86%

Habitats and landscapes associated with bird species in a lowland conifer-dominated ecosystem

Zlonis¹,

Panci²,

Bednar³

et al. 2017

ACE

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ABSTRACT. Human-induced effects on lowland conifer forests in hemiboreal regions are increasing because of expanded use of these northern ecosystems for raw materials, energy, and minerals as well as the potential effects of climatic changes. These forests support many breeding bird species across the Holarctic and allow the persistence of several boreal bird species in hemiboreal and even temperate regions. These bird species are of particular conservation concern as shifting patterns northward in forest composition caused by climate change will likely affect their populations. However, effective management and conservation options are limited because the specifics of these species' breeding habitats are not well understood. We modeled and mapped habitat suitability for 11 species of boreal birds that breed in the lowland conifer forests of the Agassiz Lowlands Ecological Subsection in northern Minnesota and are likely to have reduced breeding habitat in the future: Spruce Grouse (Falcipennis canadensis), Black-backed Woodpecker (Picoides arcticus), Olivesided Flycatcher (Contopus cooperi), Yellow-bellied Flycatcher (Empidonax flaviventris), Boreal Chickadee (Poecile hudsonicus), Goldencrowned Kinglet (Regulus satrapa), Ruby-crowned Kinglet (Regulus calendula), Swainson's Thrush (Catharus ustulatus), Connecticut Warbler (Oporornis agilis), Palm Warbler (Setophaga palmarum), and Dark-eyed Junco (Junco hyemalis). Sets of 7 to 16 potential environmental covariates, including both stand-level and landscape attributes, were used to develop individual species models. Within this lowland conifer-dominated ecosystem, we found significant selection for specific forest and landscape characteristics by all but one of these species, with the best models including between one and nine variables. Habitat suitability maps were developed from these models and predictions tested with an independent dataset. Model performance depended on species, correctly predicting 56-96% of test data. We present a map combining suitability scores for five species of conservation concern that has been used for conservation planning and management opportunities across a broad, lowland forest landscape. We recommend managers utilize the detailed model development and validation framework to address local and regional conservation issues. Milieux et paysages associés avec certaines espèces d'oiseaux dans un écosystème composé de basses terres dominées par les conifèresRÉSUMÉ. Les impacts provoqués par l'homme sur les forêts conifériennes sises en terrain bas dans les régions hémiboréales augmentent en raison de l'exploitation de plus en plus importante de ces forêts pour les matières premières, l'énergie et les mines, en plus des effets potentiels des changements climatiques. Ces forêts hébergent de nombreuses espèces d'oiseaux holarctiques et assurent la persistance de plusieurs espèces des régions hémiboréale et même tempérée. La conservation de ces espèces d'oiseaux est particulièrement préoccupante considérant que le déplacement de la composi...

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Section: Model Evaluationsupporting

confidence: 86%

Habitats and landscapes associated with bird species in a lowland conifer-dominated ecosystem

Zlonis¹,

Panci²,

Bednar³

et al. 2017

ACE

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show abstract

“…The fact that Bicknell's Thrushes (typically a single bird, but sometimes 2 or 3 individuals) responded to conspecific playback by approaching the speaker demonstrates that our experiment successfully generated aggressive responses to playback, despite this species' complex breeding and spatial system. We also note that the breeding and spatial system of Swainson's Thrush is poorly understood (Mack and Yong 2000), and may not necessarily be a typical passerine system with social monogamy and male territorial defense. While Swainson's Thrushes appear to be behaviorally dominant over Bicknell's Thrushes, interspecific interactions between other Catharus species are likely more complex.…”

Section: Discussionmentioning

confidence: 98%

“…The 2 species defend home ranges through physical (approaching and chasing intruders) and vocal (singing and calling) behavior, with vocal activity concentrated at dawn and dusk (Mack andYong 2000, Rimmer et al 2015). The territorial system of Swainson's Thrushes remains poorly studied, while Bicknell's Thrush has an unusual mating system in which multiple paternity appears to be common and nestlings are fed by multiple males (Goetz et al 2003).…”

Section: Study Speciesmentioning

confidence: 99%

“…Related to this system, Bicknell's Thrush males have large home ranges that are not necessarily strictly defended, while females hold exclusive territories (Goetz et al 2003). During the breeding season, both species forage for insects on or near the forest floor (Mack andYong 2000, Rimmer et al 2015), although Swainson's Thrushes also use gleaning and hawking to capture insects more readily than Bicknell's Thrushes (Holmes and Robinson 1988 Song playback experiments are an appropriate method to measure interspecific aggression in Catharus, as aggression in this group is primarily based on vocal (rather than visual) signals (Dilger 1956, Noon 1981. We first compiled natural vocalizations recorded from northeastern North America for both species from the Macaulay Library (Cornell Lab of Ornithology, Ithaca, New York, USA; www.macaulaylibrary.org) and xeno-canto.org (n ¼ 6 and n ¼ 9 songs for Bicknell's and Swainson's thrushes, respectively).…”

Section: Study Speciesmentioning

confidence: 99%

See 1 more Smart Citation

Decline of a New Hampshire Bicknell's Thrush Population, 1993–2003

Lambert¹,

King²,

Buonaccorsi³

et al. 2008

Northeastern Naturalist

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“…Because we relied only on longitude to infer migration periods, our estimates of the beginning and end of migration movements should Swainson's Thrush (Catharus ustulatus) has emerged as one of the models for understanding the ecology and migratory connectivity of Neotropical migrants (Ruegg and Smith 2002, Gardali et al 2003, Kelly et al 2005, Delmore et al 2012, LaManna et al 2012). Swainson's Thrushes breed along the west coast, in sections of the Rocky Mountains, and throughout the northern continental interior of North America and winter in southern Mexico and Central and South America (Mack and Yong 2000). Using stable isotopes, Ruegg and Smith (2002) found that migratory patterns in Swainson's Thrush track shifts in habitat that occurred during the Late Pleistocene.…”

mentioning

confidence: 99%