Visitors to nests of Hooded Vultures<i>Necrosyrtes monachus</i>in northeastern South Africa

Thompson, Lindy J.; Davies, John P.; Gudehus, Maja; Botha, André; Bildstein, Keith L.; Murn, Campbell; Downs, Colleen T.

doi:10.2989/00306525.2017.1321049

Cited by 17 publications

(12 citation statements)

References 36 publications

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“…Immature Hooded Vultures had monthly home‐ranges that were generally much larger than those of adults, in line with studies on other vulture species (Phipps et al 2013, Krüger et al 2014). This may be because adult Hooded Vultures visit and are somewhat ‘attached’ to their nests year round (Thompson et al 2017), whereas immatures may not be spatially constrained in this way. Furthermore, immature Hooded Vultures may range more widely because they are seeking foraging areas away from adult conspecifics, where they may compete with other vultures (Mundy et al .…”

Section: Discussionmentioning

confidence: 99%

“…1994; Dowsett‐Lemaire & Dowsett 2014; Steyn 1982; Tarboton & Allan 1984; Thompson et al . 2017; Brown et al 1982), where breeding was the period between courtship and nest building to fledging ( sensu Krüger et al 2014)), ‘Subspecies’ (either ‘ monachus ’ or ‘ pileatus ’, depending on the tagging location) and ‘Region’ (i.e. ‘western’ (The Gambia), ‘eastern’ (Kenya and Ethiopia) or ‘southern’ (South Africa, Botswana and Mozambique) Africa, depending on the tagging location (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…A primary aim of our study was to determine which factors affect monthly home‐range size of Hooded Vultures. Adult Hooded Vultures visit their nests throughout the year (Thompson et al 2017), so we hypothesized that age‐class may affect home‐range size and we predicted that adults would have smaller home‐ranges compared with immatures. Second, non‐breeding adult Cape and Bearded Vultures use larger home‐ranges than breeding adults do (Krüger et al 2014, Pfeiffer et al 2015) so we hypothesized that non‐breeding adults would use larger home‐ranges compared with breeding adults.…”

Section: Figurementioning

confidence: 99%

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Variation in monthly sizes of home‐ranges of Hooded Vultures Necrosyrtes monachus in western, eastern and southern Africa

Thompson

Barber

Bechard

et al. 2020

Ibis

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Tracking studies are often used to inform conservation plans and actions. However, species have frequently only been tracked in one or a few localities, whereas space use can be remarkably flexible, especially in long‐lived species with advanced learning abilities. We assessed variability in space use in the Critically Endangered Hooded Vulture Necrosyrtes monachus by pooling movement data from three populations across the species’ sub‐Saharan range (in South Africa, Botswana, Ethiopia, Kenya, The Gambia and Mozambique). We estimated minimum convex polygons and kernel density estimators (KDEs) and compared monthly home‐range sizes between breeding and non‐breeding seasons, age‐classes and subspecies, accounting for uneven sampling within groups. Mean (± sd) monthly home‐range sizes (95% KDEs) for adult Hooded Vultures from southern (12 453 ± 21 188 km2, n = 82) and eastern Africa (3735 ± 3652 km2, n = 24) were 103 and 31 times larger than those of conspecifics from western Africa (121 ± 98 km2, n = 48). This may relate partly to subspecific differences, and individuals with small home‐ranges in western Africa and Ethiopia were trapped in urban environments. Regional variation in space use by Hooded Vultures may be linked to flexibility in feeding behaviour (degree of commensalism) which may arise in response to resource availability and persecution in different areas. Age‐class also affected monthly home‐range sizes, with immature birds generally having larger monthly home‐range size estimates than adults. Our results highlight the flexibility of Hooded Vultures in terms of their home‐range sizes and suggest that home‐range sizes differ between populations and individuals, depending on the extent of human commensalism. Our results also reaffirm the importance of international co‐operation in conservation efforts aimed at protecting this wide‐ranging, non‐migratory species.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Variation in monthly sizes of home‐ranges of Hooded Vultures Necrosyrtes monachus in western, eastern and southern Africa

Thompson

Barber

Bechard

et al. 2020

Ibis

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“…To date, interactions between small birds and large birds of prey have seldom been documented, but technology advances have made it possible to study these interactions (Thompson et al 2017). With the use of of camera traps, we are able to report observations from the breeding nests of top predators that are extremely rare in Europe, that is, greater spotted eagle ( Clanga clanga ), lesser spotted eagle ( Clanga pomarina ), and their hybrids.…”

Section: Figmentioning

confidence: 99%

“…Because of methodical constraints, to date little is known about nonhost species visiting raptor nests (Thompson et al 2017). Continuous monitoring by camera traps of big raptor nests has changed our understanding of the interspecific interaction between predators and smaller bird species, mainly passerines.…”

Section: Figmentioning

confidence: 99%