Nesting Biology of Three Grassland Passerines in the Northern Tallgrass Prairie

Winter, Maiken; Johnson, Douglas H.; Shaffer, Jill A.; Svedarsky, W. Daniel

doi:10.1676/03-082

Cited by 35 publications

(63 citation statements)

References 16 publications

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“…However, the rate of parasitism could vary locally. Parasitism rates are 37% (n=47 nests) in Wisconsin (Johnson and Temple, 1990), 5.9 % (n=136 nests) in Ontario (Peck and James, 1987) and 10.8% in northwest Minnesota and southeast North Dakota (Winter et al, 2004).…”

Section: Parasitism By the Brown-headed Cowbirdmentioning

confidence: 99%

“…comm., 2008). Reproductive success is reportedly lower in small habitat fragments (Kuehl and Clark, 2002;Winter et al, 2004). In addition, the Bobolink responds negatively to the presence of edges separating its habitat, and particularly forest edges (Helzer and Jelinski, 1999;.…”

Section: Microhabitatmentioning

confidence: 99%

“…Polygamous males generally feed at only one nest, often the primary nest (Martin, 1974;Wittenberger, 1982). In the U.S. midwest, two fledglings are produced on average (Winter et al, 2004). Fledging success ranges from 42% to 57% in New York State (Martin, 1971) and from 56% to 77% in southern Quebec (Lavallée, 1998;Frei et al, submitted).…”

Section: Biology Reproductionmentioning

confidence: 99%

“…In general, the Bobolink is not a frequent host of the Brown-headed Cowbird (Molothrus ater) in North America (Peck and James, 1987;Winter et al, 2004;Renfrew et al, 2005). However, the rate of parasitism could vary locally.…”

Section: Parasitism By the Brown-headed Cowbirdmentioning

confidence: 99%

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Grassland Bird Productivity in Warm Season Grass Fields in Southwest Wisconsin

Byers

Ribic

Sample

et al. 2017

The American Midland Naturalist

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Section: Parasitism By the Brown-headed Cowbirdmentioning

confidence: 99%

Section: Microhabitatmentioning

confidence: 99%

Section: Biology Reproductionmentioning

confidence: 99%

Section: Parasitism By the Brown-headed Cowbirdmentioning

confidence: 99%

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Grassland Bird Productivity in Warm Season Grass Fields in Southwest Wisconsin

Byers

Ribic

Sample

et al. 2017

The American Midland Naturalist

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“…For example, in Bobolinks egg laying typically occurs over a 41 day period, with a 10-13 day incubation period, followed by 10-13 days when young are in the nest prior to fledging (Bollinger et al 1990, Winter et al 2004). Thus, the earliest laid eggs could produce fledged young before the laying period ends (Fig.…”

Section: Modeling Approachmentioning

confidence: 99%

Estimated Mortality of Selected Migratory Bird Species from Mowing and Other Mechanical Operations in Canadian Agriculture

Tews¹,

Bert²,

Mineau³

2013

ACE

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ABSTRACT. Mechanical operations such as mowing, tilling, seeding, and harvesting are well-known sources of direct avian mortality in agricultural fields. However, there are currently no mortality rate estimates available for any species group or larger jurisdiction. Even reviews of sources of mortality in birds have failed to address mechanical disturbance in farm fields. To overcome this information gap we provide estimates of total mortality rates by mechanical operations for five selected species across Canada. In our step-by-step modeling approach we (i) quantified the amount of various types of agricultural land in each Bird Conservation Region (BCR) in Canada, (ii) estimated population densities by region and agricultural habitat type for each selected species, (iii) estimated the average timing of mechanical agricultural activities, egg laying, and fledging, (iv) and used these values and additional demographical parameters to derive estimates of total mortality by species within each BCR. Based on our calculations the total annual estimated incidental take of young ranged from ~138,000 for Horned Lark (Eremophila alpestris) to as much as ~941,000 for Savannah Sparrow (Passerculus sandwichensis). Net losses to the fall flight of birds, i.e., those birds that would have fledged successfully in the absence of mechanical disturbance, were, for example ~321,000 for Bobolink (Dolichonyx oryzivorus) and ~483,000 for Savannah Sparrow. Although our estimates are subject to an unknown degree of uncertainty, this assessment is a very important first step because it provides a broad estimate of incidental take for a set of species that may be particularly vulnerable to mechanical operations and a starting point for future refinements of model parameters if and when they become available.RÉSUMÉ. Les opérations mécanisées telles que le fauchage, le labourage, l'ensemencement et la récolte sont des sources bien connues de mortalité aviaire directe dans les champs agricoles. Toutefois, il n'existe actuellement aucune estimation du taux de mortalité pour tout groupe d'oiseaux ou grande région. Même les revues de littérature visant à dresser les sources de mortalité d'oiseaux n'ont pas examiné le dérangement attribué aux opérations mécanisées dans les champs agricoles. Pour pallier ce manque d'information, nous présentons des estimations du taux de mortalité totale par les opérations mécanisées chez cinq espèces dans l'ensemble du Canada. Notre approche de modélisation par étape nous a permis de : 1) quantifier la superficie de divers types de milieux agricoles dans chaque région de conservation des oiseaux (RCO) au Canada; 2) estimer les densités de population par RCO et type de milieux agricoles pour chacune des cinq espèces; 3) estimer la période moyenne des activités agricoles mécanisées, de la ponte et de l'envol de jeunes; et 4) utiliser ces valeurs et d'autres paramètres démographiques pour calculer des estimations de la mortalité totale par espèce dans chaque RCO. Selon nos calculs, la prise accessoire annuelle de...

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Detecting ecological traps inhuman‐alteredlandscapes: A case study of the thick‐billed longspur nesting in croplands

Swicegood

Ellison²,

Sather

et al. 2023

Ecology and Evolution

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Conversion of the North American prairies to cropland remains a prominent threat to grassland bird populations. Yet, a few species nest in these vastly modified systems.Thick-billed longspurs historically nested in recently disturbed or sparsely vegetated patches within native mixed-grass prairie, but observations of longspurs in spring cereal and pulse crop fields during the breeding season in northeastern Montana, USA, suggest such fields also provide cues for habitat selection. Maladaptive selection for poor-quality habitat may contribute to ongoing declines in longspur populations, but information on thick-billed longspur breeding ecology in crop fields is lacking. We hypothesized that crop fields may function as ecological traps; specifically, we expected that crop fields may provide cues for territory selection, but frequent human disturbance would result in reduced reproduction. To address this hypothesis, we compared measures of habitat selection (settlement patterns and trends in abundance) and productivity (nest density, nest survival, and number of young fledged) between crop fields and native grassland sites during 2020-2021. Across both years, settlement patterns were similar between site types and occupancy ranged from 0.52 ± 0.17 SE to 0.99 ± 0.01 on April 7 and 30, respectively. Early season abundance differed by year, and changes in abundance during the breeding season appeared to be associated with precipitation-driven vegetation conditions rather than habitat type. While an index of nest density was lower in crop than native sites, the number of young fledged per successful nest (2.9 ± 0.18 SE) and nest survival (0.24 ± 0.03 SE; n = 222 nests) were similar for crop and native sites. Collectively, the data did not support our ecological trap hypothesis: longspurs did not exhibit a clear preference for crop sites and reproductive output was not significantly reduced. Our results indicate that croplands may provide alternative breeding habitat within a human-dominated landscape.

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Nesting Biology of Three Grassland Passerines in the Northern Tallgrass Prairie

Cited by 35 publications

References 16 publications

Grassland Bird Productivity in Warm Season Grass Fields in Southwest Wisconsin

Grassland Bird Productivity in Warm Season Grass Fields in Southwest Wisconsin

Estimated Mortality of Selected Migratory Bird Species from Mowing and Other Mechanical Operations in Canadian Agriculture

Detecting ecological traps inhuman‐alteredlandscapes: A case study of the thick‐billed longspur nesting in croplands

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