Diets of Wedge-tailed Eagles (Aquila audax) and Little Eagles (Hieraaetus morphnoides) Breeding Near Canberra, Australia

Olsen, Jerry; Judge, David; Fuentes, Ernesto Esteban; Rose, A B; Debus, Stephen

doi:10.3356/jrr-09-28.1

Cited by 20 publications

(26 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Olsen et al . () reported 16 studies, of which I averaged the overall proportion of prey size and obtained a mean 0.24 and median of 0.26. The close match between that study and this one points to the existence of an optimal prey size (all other things being equal) shared by avian predators.…”

Section: Discussionmentioning

confidence: 99%

Meta‐analyses of nest predation in temperate Australian forests and woodlands

Fulton

2019

Austral Ecology

View full text Add to dashboard Cite

Nest predation is the leading cause of nesting failure. Thus it is a crucial area of research needed to inform conservation management and to understand the life history of birds. I surveyed the literature to review the identity of nest predators and the factors affecting nest predation, in Australia using 177 studies. Overall, 94 nest predators were identified when incorporating artificial nests, 69 without. Using only natural nests, the Pied Currawong Strepera graculina was the most frequently reported nest predator. Five nest predators, including Pied Currawong, depredated 40% of the prey measured by the number of prey species taken. Yet, 60% of predation was carried out by the other 64 species, which included by the order of importance birds, mammals, reptiles, frogs and ants. Predation at cup and dome nests was more frequently reported than at burrow, ground and hollow nests. Only 28% of predators were observed at both artificial and natural nests suggesting artificial nests have limited, but not negligible, ability as tools for identifying predators. There was a highly significant and positive correlation between predator and prey masses. The predator prey mass ratio was calculated with a mean 0.25 and a median 0.22, a result closely matching with the proportional size of prey taken by raptors. The finding that predator size is proportional to prey opens a pathway for more life history and conservation research.Abstract in Chinese is available with online material.

show abstract

Section: Discussionmentioning

confidence: 99%

Meta‐analyses of nest predation in temperate Australian forests and woodlands

Fulton

2019

Austral Ecology

View full text Add to dashboard Cite

show abstract

“…Lepus europaeus and Oryctolagus cuniculus now make up 90% of the diet of the black‐chested buzzard‐eagle Geranoaetus melanoleucus and Aquila audax (Olsen et al. , Arriagada et al. ).…”

Section: Effects On Predatorsmentioning

confidence: 99%

“…Introduced leporids may strongly affect their predators, both native and exotic. Lepus europaeus and Oryctolagus cuniculus now make up 90% of the diet of the blackchested buzzard-eagle Geranoaetus melanoleucus and Aquila audax (Olsen et al 2010, Arriagada et al 2011. Therefore, the feeding behaviour of these eagles is now similar to that of those super-specialists that consume leporids in their native range (e.g.…”

Section: Effects On Predatorsmentioning

confidence: 99%

The roles of leporid species that have been translocated: a review of their ecosystem effects as native and exotic species

Barbar

Lambertucci

2018

Mammal Review

View full text Add to dashboard Cite

Historically, humans have translocated some species of Leporidae (order Lagomorpha) around the world as an introduced food source and as game species. This family is now cosmopolitan and occupies areas where it did not previously exist. With the exception of European rabbits Oryctolagus cuniculus, evidence of the effects of these introduced species is scattered and in many cases anecdotal, though they share many biological traits with Oryctolagus cuniculus, one of the most harmful invasive species worldwide. We review available studies on the 12 leporid species that have been introduced by humans to areas beyond their native ranges. Our aim is to describe and compare the species’ ecological roles in their native geographic ranges and in their exotic ranges. We review the species’ effects on the ecosystem at different levels of the trophic chain. We also evaluate the consequences of introductions for animal and human health, and their economic consequences, and we consider control measures. In their native ranges, the 12 leporids are known to provide resources for other species, act as seed dispersers and ecosystem engineers, function as primary prey items for several predator species, and have many other functions. The effects of the leporids in their exotic geographic ranges are also conspicuous, and in many cases strongly negative, due to competition with native fauna and the facilitation of the presence of other invaders. Nonetheless, they constitute a food resource for native and exotic predators. As game species for humans, their hunting may indirectly impact the ecosystems by increasing the amount of lead in the environment. Moreover, they may be carriers of zoonotic diseases. Conservation biologists should carefully consider the contrasting effects of the introduced leporids species in the ecosystem before developing any management strategy including these species.

show abstract

“…In the community of sympatric diurnal raptors, however, differences along the resources axis could play a most important role: food abundance along with the availability of suitable nest sites has been considered the most important resource in raptors (Newton 2003). Sympatric raptors usually consume different prey (Giovanni et al 2007;Olsen et al 2010), but intense competition for nest sites could occur among forestdwelling raptors (Krüger 2002a), which typically prefer old growth forests at different spatial scales (Treinys and Mozgeris 2010 and references therein). Heavy stick nests of medium-size and large raptors can only be constructed in large trees (Kostrzewa 1996;Lõhmus 2006), and this demand greatly reduces the potential nesting habitat.…”

Section: Introductionmentioning

confidence: 99%

Coexistence of protected avian predators: does a recovering population of White-tailed Eagle threaten to exclude other avian predators?

Treinys

Dementavičius

Mozgeris³

et al. 2011

Eur J Wildl Res

View full text Add to dashboard Cite

The processes of competition and predation determine the degree to which species can coexist; the importance of competition in particular has been emphasized at high trophic levels. Competition exclusion will occur when habitat overlap between sympatric species is high. In this study, we investigated nesting habitat overlap between internationally protected diurnal tree-nesting avian predators of central Europe, namely, White-tailed Eagle (Haliaeetus albicilla), Lesser Spotted Eagle (Aquila pomarina), Black Stork (Ciconia nigra), and Osprey (Pandion haliaetus). We found significantly different nesting habitats among the study species and suggest that this could be a consequence of the resource-based segregation, but not a consequence of asymmetrical interspecific competition. The results also show that habitat of the recovering populations of White-tailed Eagle overlapped with the habitat used by the Lesser Spotted Eagle, Black Stork, and Osprey to varying extents with a niche overlap values being below the competition exclusion threshold. Nevertheless, we suggest that competition by White-tailed Eagle at a population level may limit Osprey, though not Lesser Spotted Eagle or Black Stork.

show abstract

Diets of Wedge-tailed Eagles (Aquila audax) and Little Eagles (Hieraaetus morphnoides) Breeding Near Canberra, Australia

Cited by 20 publications

References 32 publications

Meta‐analyses of nest predation in temperate Australian forests and woodlands

Meta‐analyses of nest predation in temperate Australian forests and woodlands

The roles of leporid species that have been translocated: a review of their ecosystem effects as native and exotic species

Coexistence of protected avian predators: does a recovering population of White-tailed Eagle threaten to exclude other avian predators?

Contact Info

Product

Resources

About