Unusual Raptor Nests Around The World

Ellis, David; Craig, Tim; Craig, Erica H.; Postupalsky, Sergej; LaRue, Charles T.; Nelson, R. Wayne; Anderson, Daniel W.; Henny, Charles J.; Watson, J.; Millsap, Brian A.; Dawson, Jane; Cole, Kenneth L.; Martin, Elwood M.; Margalida, Antoni; Küng, Peter

doi:10.3356/jrr-08-110.1

Cited by 36 publications

(16 citation statements)

References 10 publications

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“…Sometimes Golden Eagle will decorate multiple nests in a single year; continuing to do so until they lay eggs in the selected nest. The completed nest structure(s) can vary from large and multi-layered; or a small augmentation of sticks in caves with little material other than extant detritus (Ellis et al 2009). Most Golden Eagle territories have up to 6 nests, but they have been found to contain up to 14 nests (Palmer 1988, Watson 1997.…”

Section: Basic Golden Eagle Ecologymentioning

confidence: 99%

Daytime Habitat Selection by Resident Golden Eagles (Aquila chrysaetos) in Southern Idaho, U.S.A

LeBeau¹,

Nielson²,

Hallingstad³

et al. 2015

Journal of Raptor Research

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Section: Basic Golden Eagle Ecologymentioning

confidence: 99%

Daytime Habitat Selection by Resident Golden Eagles (Aquila chrysaetos) in Southern Idaho, U.S.A

LeBeau¹,

Nielson²,

Hallingstad³

et al. 2015

Journal of Raptor Research

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“…These structures are subsequently believed to facilitate the species' persistence in the region. Other species nesting on utility structures include martial eagles (Polemaetus bellicosus;Dean 1975), kestrels (F. tinnunculus; Krueger 1998), and hobbys (F. subbuteo; Puzović 2008) in Europe, upland buzzards (Buteo hemilasius; Ellis et al 2009) in Asia, and ferruginous hawks (B. regalis; Gilmer and Wiehe 1977), Swainson's hawks (B. swainsoni; James 1992), and prairie falcons (F. mexicanus; Roppe et al 1989) in North America.…”

mentioning

confidence: 99%

Managing nesting by Chihuahuan ravens on H‐frame electric transmission structures

Dwyer

Leiker

2012

Wildlife Society Bulletin

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Electric utility structures occur widely in natural and human-dominated landscapes and are often used by birds for nesting. Nests can cause power outages, fires, and electrocution of birds and their young, particularly if nests occur directly above energized equipment and incorporate metal wire. Chihuahuan raven (Corvus cryptoleucus) nests often contain metal wire and occur over energized equipment. To explore a proactive risk mitigation strategy we deployed novel nest diverters on 51 structures supporting a 230 kV H-frame transmission line in Kiowa and Bent Counties, Colorado, USA, and compared nesting on these structures with nesting on 66 structures without nest diverters on the same line. Chihuahuan ravens placed nest material on 7% of treated structures and 43% of untreated structures and nested on 0% of treated structures and 34% of untreated structures. Chihuahuan ravens were less likely to attempt to nest on, or actually nest on, structures treated with nest diverters. Future research should evaluate nest diverters over larger spatial and temporal scales and compare prey populations in areas where ravens are excluded to prey populations in areas where ravens persist. ß 2012 The Wildlife Society.

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“…At present, the number of roads, car traffic and extent of human population is still low in our study area [23], which might explain why variables representing human disturbance were less explicative in our study. Other large avian scavengers are known to avoid human constructions selectively (California condor [25], [54] Old world vultures [55], [56]); sometimes they can be tolerant to human constructions when they find a location appropriate, for instance, to rest or breed [57]. However, this can pose other problems such as the introduction of competitor species, furtive hunting, and nesting failure [24], [26], [58], [59].…”

Section: Discussionmentioning

confidence: 99%

Cliffs Used as Communal Roosts by Andean Condors Protect the Birds from Weather and Predators

Lambertucci

Ruggiero

2013

PLoS ONE

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The quality and availability of resources influence the geographical distribution of species. Social species need safe places to rest, meet, exchange information and obtain thermoregulatory benefits, but those places may also serve other important functions that have been overlooked in research. We use a large soaring bird that roosts communally in cliffs, the Andean condor (Vultur gryphus), as a model species to elucidate whether roost locations serve as a refuge from adverse weather conditions (climatic refuge hypothesis, CRH), and/or from predators or anthropogenic disturbances (threats refuge hypothesis, TRH). The CRH predicts that communal roosts will face in the opposite direction from where storms originate, and will be located in climatically stable, low precipitation areas. The TRH predicts that communal roosts will be large, poorly accessible cliffs, located far from human-made constructions. We surveyed cliffs used as communal roosts by condors in northwestern Patagonia, and compared them with alternative non-roosting cliffs to test these predictions at local and regional scales. We conclude that communal roosting places provide refuge against climate and disturbances such as, for instance, the threats of predators (including humans). Thus, it is not only the benefits gained from being aggregated per se, but the characteristics of the place selected for roosting that may both be essential for the survival of the species. This should be considered in management and conservation plans given the current scenario of global climate change and the increase in environmental disturbances.

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Unusual Raptor Nests Around The World

Cited by 36 publications

References 10 publications

Daytime Habitat Selection by Resident Golden Eagles (Aquila chrysaetos) in Southern Idaho, U.S.A

Daytime Habitat Selection by Resident Golden Eagles (Aquila chrysaetos) in Southern Idaho, U.S.A

Managing nesting by Chihuahuan ravens on H‐frame electric transmission structures

Cliffs Used as Communal Roosts by Andean Condors Protect the Birds from Weather and Predators

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