Home-Range Size and Examples of Post-Nesting Movements for Adult Golden Eagles (<i>Aquila chrysaetos</i>) in Boreal Sweden

Moss, E. H.; Hipkiss, Tim; Ecke, Frauke; Dettki, Holger; Sandström, Per; Bloom, Peter H.; Kidd, Jeff W.; Thomas, Scott E.; Hörnfeldt, Birger

doi:10.3356/jrr-13-00044.1

Cited by 39 publications

(41 citation statements)

References 38 publications

(38 reference statements)

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“…Studies of Golden Eagle habitat use have involved both migratory (e.g. Brodeur et al 1996, Alerstam 2001, McIntyre et al 2008, Duerr et al 2012, Johnston et al 2013, Moss et al 2014, Domenech et al 2015 and non-migratory birds (Marzluff et al 1997, Carrete et al 2000, McLeod et al 2002b, Sergio et al 2006, Tapia et al 2007, Sandgren et al 2014, Watson et al 2014, Braham et al 2015, Poessel et al 2016, Miller et al 2017, Tracey et al 2018. Later studies have benefitted from GPS telemetry (L opez-L opez 2016).…”

mentioning

confidence: 99%

A simple topographical model to predict Golden Eagle Aquila chrysaetos space use during dispersal

Fielding¹,

Haworth²,

Anderson

et al. 2019

Ibis

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Many large raptors exploit or rely on anabatic and orographic winds which provide vertical lift, to supplement or provide the energy fuelling flight. Airspace is therefore a critical habitat for such large raptors and its use is subject to the underlying terrestrial topography, because particular topographical features are more likely to provide wind‐energetic lift. Accordingly, ridges and/or ‘rugged topography’ are common preferred features in habitat use by large raptors. Our study aimed to provide a simple model of space use for a large raptor, the Golden Eagle Aquila chrysaetos, based on thousands of GPS telemetry records during juvenile dispersal of 92 birds tagged as nestlings between 2007 and 2016 across upland Scotland. Model development was based on the hypothesis that four topographical variables would be influential: slope, aspect, altitude and distance from ridge. The telemetry dataset was divided into training and two testing components. The first testing set was derived by a temporal split resulting in approximately equal sample size on records and some temporal overlap in individuals’ records with training data. The second testing set involved no individuals from the training set. Aspect was removed early in training model development because it was not influential. The model found that young Golden Eagles preferred, or used according to availability, space above slopes greater than 10°, at an altitude of ≥ 300 m, and within 300 m of a ridge. The test data were highly correlated with those from the training data in the model variables, and performance as regard to expected preferences from the model was improved in both test datasets, indicating the model was robust. Given the apparent universal nature of large raptor dependence on topography, that topography is relatively immutable according to time and use, and that topographical data are readily available, we commend our approach to other habitat preference studies of Golden Eagles and other large raptors elsewhere.

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mentioning

confidence: 99%

A simple topographical model to predict Golden Eagle Aquila chrysaetos space use during dispersal

Fielding¹,

Haworth²,

Anderson

et al. 2019

Ibis

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“…Little is known about the movements of adults in the northern boreal forest in Europe, although a recent study of satellite-tagged adults in northern Sweden has shown that even some adults may leave their territories, especially after failed breeding (Moss et al 2014). Five of the juveniles that were tagged on the coast of Finnmark were found dead at varying distances in the same region within 7 mo after tagging.…”

Section: Discussionmentioning

confidence: 96%

“…Additionally, when comparing mortality sources and wintering areas between ring-tagged and satellite-tagged juvenile Golden Eagles from Alaska, McIntyre (2012) found differences that could be attributed to an effect of the extra burden of the transmitter (more deaths due to starvation and wintering ranges farther north). A study involving satellite-tagged adult Golden Eagles in Sweden showed indications of possible adverse effects of transmitters (high nesting failure; Moss et al 2014). Our own data do not allow assessment of potential effects, due to few ring recoveries and lack of necropsies.…”

Section: Discussionmentioning

confidence: 99%

Dispersal and Survival of Juvenile Golden Eagles (Aquila chrysaetos) from Finnmark, Northern Norway

Nygård

Jacobsen

Johnsen

et al. 2016

Journal of Raptor Research

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“…The managed forest landscape in boreal Sweden is dynamic, whereby clearcuts, which are favoured hunting habitats for Golden Eagles (Moss et al 2014, Sandgren et al 2014, successively grow into unfavourable thicket forest, while mature forests are harvested to become new eagle hunting grounds. Thus the quality of territories may also change over time.…”

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confidence: 99%

Variation in quality of Golden Eagle territories and a management strategy for wind farm projects in northern Sweden

2014

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Breeding productivity of 86 occupied Golden Eagle territories in northern Sweden varied greatly, with the upper quartile of the most productive territories being responsible for 44% of the total productivity of the studied territories. This information is used in a regional strategy for managing wind farm project proposals in areas inhabited by Golden Eagles, whereby the more productive territories are provided with a greater degree of protection than their less productive counterparts.

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Home-Range Size and Examples of Post-Nesting Movements for Adult Golden Eagles (Aquila chrysaetos) in Boreal Sweden

Cited by 39 publications

References 38 publications

A simple topographical model to predict Golden Eagle Aquila chrysaetos space use during dispersal

A simple topographical model to predict Golden Eagle Aquila chrysaetos space use during dispersal

Dispersal and Survival of Juvenile Golden Eagles (Aquila chrysaetos) from Finnmark, Northern Norway

Variation in quality of Golden Eagle territories and a management strategy for wind farm projects in northern Sweden

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