Aspects of the Ecology of Urban-Nesting Bald Eagles (Haliaeetus leucocephalus) in South-Coastal British Columbia

Goulet, Raphaël; Bird, David M.; Hancock, David

doi:10.3356/0892-1016-55.1.65

Cited by 7 publications

(4 citation statements)

References 47 publications

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“…However, from a global perspective, larger raptors are not always urban avoiders: in South Africa, for example, Crowned Eagles ( Stephanoaetus coronatus ) feed on urban exploiters such as the Rock Hyrax ( Procavia capensis ), Hadeda Ibis ( Bostricia hagedash ) nestlings, and Vervet Monkeys ( Chlorocebus pygerythrus ) which support a large urban breeding population of Crowned Eagles in Durban and Pietermaritzberg 115 . In Vancouver, Canada, Bald Eagles ( Haliaeetus leucocephalus ) feed on a variety of birds and fish, and commonly nest in tall Black Cottonwood ( Populus trichocarpa ) and Douglas Fir ( Pseudotsuga menziesii ) trees, occasionally choosing to nest on transmission towers 116 . A metanalysis of 172 threatened and near threatened raptors around the world identified body size as the strongest predictor for their conservation status 117 , whereby the larger the species, the higher the potential for exposure to anthropogenic threats and conservation concern.…”

Section: Discussionmentioning

confidence: 99%

Smaller Australian raptors have greater urban tolerance

Headland

Colombelli‐Négrel

Callaghan

et al. 2023

Sci Rep

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Urbanisation is occurring around the world at a rapid rate and is generally associated with negative impacts on biodiversity at local, regional, and global scales. Examining the behavioural response profiles of wildlife to urbanisation helps differentiate between species that do or do not show adaptive responses to changing landscapes and hence are more or less likely to persist in such environments. Species-specific responses to urbanisation are poorly understood in the Southern Hemisphere compared to the Northern Hemisphere, where most of the published literature is focussed. This is also true for raptors, despite their high diversity and comparably high conservation concern in the Southern Hemisphere, and their critical role within ecosystems as bioindicators of environmental health. Here, we explore this knowledge gap using community science data sourced from eBird to investigate the urban tolerance of 24 Australian raptor species at a continental scale. We integrated eBird data with a global continuous measure of urbanisation, artificial light at night (ALAN), to derive an urban tolerance index, ranking species from positive to negative responses according to their tolerance of urban environments. We then gathered trait data from the published literature to assess whether certain traits (body mass, nest substrate, habitat type, feeding guild, and migratory status) were associated with urban tolerance. Body size was negatively associated with urban tolerance, as smaller raptors had greater urban tolerance than larger raptors. Out of the 24 species analysed, 13 species showed tolerance profiles for urban environments (positive response), and 11 species showed avoidance profiles for urban environments (negative response). The results of this study provide impetus to conserve native habitat and improve urban conditions for larger-bodied raptor species to conserve Australian raptor diversity in an increasingly urbanised world.

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Section: Discussionmentioning

confidence: 99%

Smaller Australian raptors have greater urban tolerance

Headland

Colombelli‐Négrel

Callaghan

et al. 2023

Sci Rep

View full text Add to dashboard Cite

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“…A secondary concern that prompted listing was loss of habitat due to land development and associated human disturbance. Over the past thirty years, bald eagles have colonized urban areas throughout their range and have demonstrated the capacity to habituate to human activity (Millsap et al 2004, Schirato and Parson 2006, Goulet et al 2021). Removal of land‐use restrictions on private landowners will not result in a population reversal below recovery goals.…”

Section: Discussionmentioning

confidence: 99%

Policy and the social burden of bald eagle recovery

Watts

Byrd

2022

Conservat Sci and Prac

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One of the challenges of applying endangered species policy on private property is striking an equitable balance between species protection and civil liberties. The future of many imperiled species depends on a public‐private trust. We estimate the social burden of managing bald eagles on private lands within the lower Chesapeake Bay (1976–2016). We quantify the area of private and government‐owned land deemed critical around nests and estimate the value of private properties as an index of burden. The bald eagle population increased from 30 to 1052 breeding pairs and the land within nest buffers increased from 384 to 10,670 ha with >80% on private lands. Estimated value of private property “under guidelines” increased more than 900 fold. More than 94% of this burden was imposed after eagles reached recovery goals. Restricting activities on private lands to achieve diminishingly small conservation benefits threatens to undermine landowner participation in conservation efforts.

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“…Story Three ends on a sliver of hope. Going back to the eagles' nest, and to the credit (or, at least, obligation) of the developers, they consulted local eagle expert David Hancock (Goulet et al, 2021). A platform was built for the eagles to make a new nest near First Avenue.…”

Section: Figurementioning

confidence: 99%

Snow in Summer

Beavington

2022

Art/Research International

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In this article art is used as inquiry to ask powerful questions, untangle paradoxes, and help us navigate loss and grief in the Anthropocene. Several central questions are considered and animated through narrative and poetry. How do we live poetically (Leggo, 2005) in a world that we need to exploit in order to survive? How do we engage in a more-than-human world full of ambiguity and paradox? How might nature become a teacher or mentor (Jickling et al., 2018), and what anthropocentric barriers do we face? How can stories and poems facilitate holistic expression and place-based connection? As we elucidate the wonder and loss of cottonwood, and the mentorship of ponderosa, Carl Leggo (2004, 2005, 2012, 2016, 2019a, 2019b) serves as a guide for artful attending and hopeful imagination for living poetically. Joanna Macy’s (Macy & Johnstone, 2012; Macy & Brown, 2014) work that reconnects and Leggo’s curriculum of joy offer parallel paths of grief and hope so that we might find our way through the Anthropocene.

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Aspects of the Ecology of Urban-Nesting Bald Eagles (Haliaeetus leucocephalus) in South-Coastal British Columbia

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 7 publications

References 47 publications

Smaller Australian raptors have greater urban tolerance

Smaller Australian raptors have greater urban tolerance

Policy and the social burden of bald eagle recovery

Snow in Summer

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