Wrens on the edge: feeders predict Carolina wren <i>Thryothorus ludovicianus</i> abundance at the northern edge of their range

Job, Jacob R.; Bednekoff, Peter A.

doi:10.1111/j.1600-048x.2010.05242.x

Cited by 12 publications

(11 citation statements)

References 26 publications

(34 reference statements)

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“…Anna's hummingbirds are also more closely associated with human-modified landscapes in more northern latitudes, implying that people have facilitated this reduction in migratory behaviour and corresponding winter range expansion. Our study complements previous work showing that urban habitat and supplementary feeding may facilitate range expansions into colder climates [11,12,32,33] and potentially changes in migratory behaviour [13,14,31]. This pattern of human-assisted colonization is not unique to northward range shifts, as demonstrated by the colonization of novel areas by invasive species (e.g.…”

Section: Discussionsupporting

confidence: 88%

Winter range expansion of a hummingbird is associated with urbanization and supplementary feeding

2017

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Anthropogenic changes to the landscape and climate cause novel ecological and evolutionary pressures, leading to potentially dramatic changes in the distribution of biodiversity. Warm winter temperatures can shift species' distributions to regions that were previously uninhabitable. Further, urbanization and supplementary feeding may facilitate range expansions and potentially reduce migration tendency. Here we explore how these factors interact to cause non-uniform effects across a species's range. Using 17 years of data from the citizen science programme Project FeederWatch, we examined the relationships between urbanization, winter temperatures and the availability of supplementary food (i.e. artificial nectar) on the winter range expansion (more than 700 km northward in the past two decades) of Anna's hummingbirds (). We found that Anna's hummingbirds have colonized colder locations over time, were more likely to colonize sites with higher housing density and were more likely to visit feeders in the expanded range compared to the historical range. Additionally, their range expansion mirrored a corresponding increase over time in the tendency of people to provide nectar feeders in the expanded range. This work illustrates how humans may alter the distribution and potentially the migratory behaviour of species through landscape and resource modification.

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Section: Discussionsupporting

confidence: 88%

Winter range expansion of a hummingbird is associated with urbanization and supplementary feeding

2017

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“…As temperatures across North America have warmed over the past century, many species that were historically restricted to the southeastern and mid-Atlantic United States have been increasingly common in the northeast United States and southern Canada (35)(36)(37)(38), although quantifying the rate and magnitude of range shifts is challenging due to the low-density and often stochastic nature of peripheral populations. Our study, which provides a quantitative assessment of the rate and magnitude of these northern limit expansions using methods that account for imperfect detection, provides compelling evidence that these leading-edge range shifts have primarily occurred in species that winter in temperate areas.…”

Section: Discussionmentioning

confidence: 99%

Migratory behavior and winter geography drive differential range shifts of eastern birds in response to recent climate change

Rushing

Royle

Ziolkowski

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Over the past half century, migratory birds in North America have shown divergent population trends relative to resident species, with the former declining rapidly and the latter increasing. The role that climate change has played in these observed trends is not well understood, despite significant warming over this period. We used 43 y of monitoring data to fit dynamic species distribution models and quantify the rate of latitudinal range shifts in 32 species of birds native to eastern North America. Since the early 1970s, species that remain in North America throughout the year, including both resident and migratory species, appear to have responded to climate change through both colonization of suitable area at the northern leading edge of their breeding distributions and adaption in place at the southern trailing edges. Neotropical migrants, in contrast, have shown the opposite pattern: contraction at their southern trailing edges and no measurable shifts in their northern leading edges. As a result, the latitudinal distributions of temperate-wintering species have increased while the latitudinal distributions of neotropical migrants have decreased. These results raise important questions about the mechanisms that determine range boundaries of neotropical migrants and suggest that these species may be particularly vulnerable to future climate change. Our results highlight the potential importance of climate change during the nonbreeding season in constraining the response of migratory species to temperature changes at both the trailing and leading edges of their breeding distributions. Future research on the interactions between breeding and nonbreeding climate change is urgently needed.

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“…Fischer & Miller, ; Fuller, Irvine KN, & Armsworth PR, ; Fuller, Warren, Armsworth, Barbosa, & Gaston, ) or geographic range expansion (e.g. Greig, Wood, & Bonter, ; Job & Bednekoff, ). However, recent studies have also highlighted potential negative effects of feeding on wild birds, such as increased risk of depredation (Hanmer, Thomas, & Fellowes, ; Malpass, Rodewald, & Matthews, ) and disease spread (Adelman, Moyers, Farine, & Hawley, ; Galbraith, Stanley, Jones, & Beggs, ; Lawson et al., ; Wilcoxen et al., ).…”

Section: Introductionmentioning

confidence: 99%

Observations at backyard bird feeders influence the emotions and actions of people that feed birds

Dayer

Rosenblatt

Bonter³

et al. 2019

People and Nature

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1. Backyard bird feeding is one of the most common ways people engage with wildlife in many parts of the world. Given its scale, it can have profound consequences for the ecology of feeder birds and their behaviour. While previous work has primarily explored socio-demographic factors associated with bird feeding, how observations of nature at backyard feeders (e.g. changes in feeder bird abundance, interaction with natural enemies and weather) influence people's propensity to feed birds remain largely unknown.2. We examined the association between peoples' observations at their backyard feeders and their emotions and behaviours related to providing food to birds. We conducted an online survey of a subset of United States participants in ProjectFeederWatch, a large-scale citizen science project.3. Overwhelmingly, respondents (n = 1,176) reported taking actions, such as managing predators or maintaining feeders, in response to observable natural factors (e.g. increased incidence of disease, the presence of predators, increased bird abundance). Additionally, respondents described a variety of emotional responses to the scenarios of depredation or disease at their feeders, some of which (particularly anger) had a small association with whether a respondent would take action in response. Respondents generally believed that their bird feeding benefits backyard birds (e.g. by improving overwinter survival and overall health), and indicated that natural factors (e.g. bird abundance, disease prevalence) and abiotic factors (i.e. cold temperature) had more of an influence on how much they feed birds than internal constraints such as time and money. 4. These findings suggest that human behaviour with respect to bird feeding is coupled to observations of nature, which could lead to feedbacks between provisioning intensity and ecological dynamics. Overall, our results have important implications for bird conservation and for understanding the potential benefits that humans receive from provisioning birds. 2 | People and Nature DAYER Et Al.

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Wrens on the edge: feeders predict Carolina wren Thryothorus ludovicianus abundance at the northern edge of their range

Cited by 12 publications

References 26 publications

Winter range expansion of a hummingbird is associated with urbanization and supplementary feeding

Winter range expansion of a hummingbird is associated with urbanization and supplementary feeding

Migratory behavior and winter geography drive differential range shifts of eastern birds in response to recent climate change

Observations at backyard bird feeders influence the emotions and actions of people that feed birds

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