Common Raven (<i>Corvus corax</i>) kleptoparasitism at a Golden Eagle (<i>Aquila chyrsaetos</i>) nest in southern Nevada

Simes, Matthew; Johnson, Diego R.; Streit, Justin; Longshore, Kathleen M.; Nussear, Kenneth E.; Esque, Todd C.

doi:10.1676/1559-4491-129.1.195

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…Kleptoparasitism is commonly reported in corvids (e.g. Baglione & Canestrari 2009;Krohn 2016;Simes et al 2017), with the Torresian Crow specifically reported harassing raptors as large as White-bellied Sea-Eagles Haliaeetus leucogaster for their prey (Le Souef 1915). Potentially supporting this explanation, incidents of Crows mobbing in the present study were more frequent during the observation period when the Ospreys were handling prey (18 May: 23.3 interactions/hour) compared with the other observation periods (17 May and 19 May: 14.6 and 9.3 interactions/ hour, respectively).…”

Section: Discussionmentioning

confidence: 99%

Frequency and behavioural accounts of interspecific interactions between a breeding pair of Eastern Ospreys Pandion haliaetus cristatus and other bird

2023

AFO

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Eastern Ospreys Pandion haliaetus cristatus at a nest in Kingscliff, New South Wales, were observed over three mornings, during which five bird species were recorded in interspecific interactions. Activity across observation periods ranged from 9.3 to 23.3 interactions per hour. The Torresian Crow Corvus orru was involved in 77% of interactions, mostly Crows and Ospreys eyeing each other from close stationary positions, though Crows investigating the nest, swooping on Ospreys and chasing them in flight were also recorded. In other interactions, Willie Wagtails Rhipidura leucophrys were recorded swooping Ospreys, eyeing them at close proximity, and investigating their nest, and Magpie-larks Grallina cyanoleuca were recorded descending on the nest and swooping on Ospreys. Only two interactions involved the Blue-faced Honeyeater Entomyzon cyanotis, in which an individual investigated the Osprey nest. Only one interaction involved an Australian Magpie Gymnorhina tibicen, in which a Magpie flying past the nest was briefly pursued by an Osprey.

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Section: Discussionmentioning

confidence: 99%

Frequency and behavioural accounts of interspecific interactions between a breeding pair of Eastern Ospreys Pandion haliaetus cristatus and other bird

2023

AFO

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“…Nesses casos, indivíduos que usualmente obtém seu alimento através de seu próprio esforço, passam a roubar alimento capturado por outros. Uma série de condições ambientais pode favorecer esse tipo de alteração comportamental, como o baixo risco de injúria em confrontos, baixa disponibilidade de alimento, fácil detecção dos itens capturados por outros indivíduos, alta qualidade dos itens disponíveis para roubo, previsibilidade das oportunidades de roubo, entre outras (BROCHMANN & BARNARD, 1979;VANDERWALL, 1990, IYENGAR, 2008, SIMES et al 2017.…”

Section: Introductionunclassified

Forrageamento em espécies de aranhas cleptoparasitas e araneofágicas invasoras de teias de Manogea porracea (Araneae: Araneidae)

Meira¹

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Many spider species build webs and remain resting on this structure to capture prey. In addition, the transmission of vibrational stimuli on webs is involved with the identification of sexual partners and the silk may act like a physical barrier that minimizes predation risk. Nevertheless, the web can be used by intruder, kleptoparasite spiders, and may allow access to araneophagic predators. In this study we observed an araneophagic species, Gelanor zonatus, and two species usually considered as kleptoparasites, Faiditus caudatus and Argyrodes elevatus, invading webs of Manogea porracea. We tested hypotheses on trophic position of intruders and their nutritional preferences. We also evaluated factors that influence their occurrence on host webs and the biomass acquired by the araneophagic predator after the consumption of different prey items. We conducted tests with nitrogen and carbon stable isotopes, field observations and laboratory experiments. Gelanor zonatus shows higher values of nitrogen isotopes when compared with other species found in the same area. It can, consequently, be considered as a secondary carnivore predator. This species shows diet selectivity based on their prey nutricional content. Furthermore we observed that the increase in predator body mass, when it consumes different prey items, varies not only with the prey mass, but also with prey species. Kleptoparasites show nitrogen isotopes values similar to Gelanor zonatus and higher than host spider species. The presence of males, females or both and the egg sacs on M. porracea webs did not explain the kleptoparasite occurrence. Finally, A. elevatus exhibit preference for prey consumption instead of eggsacs on the invaded webs.

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Araneophagy as an alternative foraging tactic to kleptoparasitism in two Argyrodinae (Araneae: Theridiidae) species

Meira

Moura

Gonzaga

2021

Behavioural Processes

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Common Raven (Corvus corax) kleptoparasitism at a Golden Eagle (Aquila chyrsaetos) nest in southern Nevada

Cited by 4 publications

References 10 publications

Frequency and behavioural accounts of interspecific interactions between a breeding pair of Eastern Ospreys Pandion haliaetus cristatus and other bird

Frequency and behavioural accounts of interspecific interactions between a breeding pair of Eastern Ospreys Pandion haliaetus cristatus and other bird

Forrageamento em espécies de aranhas cleptoparasitas e araneofágicas invasoras de teias de Manogea porracea (Araneae: Araneidae)

Araneophagy as an alternative foraging tactic to kleptoparasitism in two Argyrodinae (Araneae: Theridiidae) species

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