Results 141 to 150 of about 1,221 (205)

Kleptoparasitism and Scavenging Can Stabilize Ecosystem Dynamics

American Naturalist, 2017
Scavenging is ubiquitous in nature, but its implications have rarely been investigated. We used camera traps on wolf kills to investigate the role of scavenging on predator and multiprey dynamics in a northern Apennine system in Italy. In contrast to North American systems, the omnivorous wild boar successfully competes with wolves for the meat of ...
Giacomo Innocenti, Massimo Materassi, Stefano Focardi   +2 more
exaly   +6 more sources

Attempts of Interbrood Kleptoparasitism in Grey Heron Nestlings

Waterbirds, 2009
Abstract. Attempts of interbrood food theft (food kleptoparasitism) from chicks of Grey Heron (Ardea cinerea) by foreign nestlings are reported from three heronries situated in northern Poland. Such behavior was observed more often in two of the three sites studied. In one colony, it was recorded occasionally.
Dariusz Jakubas
exaly   +2 more sources

Foraging in landfills: Feeding behavior of the White Stork ( Ciconia ciconia ) and kleptoparasitism by Black Kites ( Milvus migrans )

Wilson Journal of Ornithology, 2021
The decline of the White Stork (Ciconia ciconia) in the Iberian Peninsula was averted within the last 30 years, partially due to an increase in food availability in landfills.
João E Rabaca, Inés Roque, Nuno Faria   +2 more
exaly   +2 more sources

Kleptoparasitism in birds

Animal Behaviour, 1979
Abstract Kleptoparasitism refers to the interspecific stealing of already procured food, but this paper shows that intraspecific food-stealing is effectively the same behaviour. A comprehensive review of the literature shows that certain orders of birds contain a disproportionate number of kleptoparasitic species.
H.Jane Brockmann, C.J. Barnard
openaire   +1 more source

Gulls and plovers: host vigilance, kleptoparasite success and a model of kleptoparasite detection

Animal Behaviour, 1985
Abstract Much interest has focused on the conflict between feeding and vigilance. However, because predator attacks are rarely observed, the adaptive value of time spent vigilant (or non-vigilant through feeding) is difficult to ascertain. On the assumption that the tactics used by plovers (lapwings, Vanellus vanellus and golden plover, Pluvialis ...
Desmond B.A. Thompson, Dennis William Lendrem   +1 more
openaire   +1 more source

Doves kleptoparasitize ants

The Southwestern Naturalist, 2015
Abstract We describe seven instances of kleptoparasitism by the Inca dove (Columbina inca) on the red harvester ant (Pogonomyrmex barbatus) in eastern Mexico, the first documented case in the order Columbiformes and the first for ants of the genus Pogonomyrmex. Doves visited the periphery of the ants' nest entrance and fed on waste material expelled by
Ernesto Ruelas Inzunza, J. Eduardo Martínez-Leyva, Jorge E. Valenzuela-González   +2 more
openaire   +1 more source

Kleptoparasitism of Coots by Gadwalls

Ornis Scandinavica, 1984
Kleptoparasitism of Coots by Gadwalls was recorded at a southern Spanish lagoon during a year of low water level, but not in previous years, when water levels were higher. Female Gadwalls parasitized Coots more frequently than did males. Once the Coot surfaced, the Gadwalls waited a few seconds before starting to parasitize, which could serve to ...
Juan A. Amat, Ramon C. Soriguer
openaire   +1 more source

Kleptoparasitism in the Great Kiskadee

The Wilson Bulletin, 2001
Kleptoparasitism has been extensively described for raptors and seabirds, but there are fewer observations for passerine birds. Here we describe several events of interspecific kleptoparasitism in the Great Kiskadee (Tyrannidae: Pitangus sulphuratus) in Buenos Aires, Argentina.
PAULO E. LLAMBÍAS, VALENTINA FERRETTI, PABLO S. RODRÍGUEZ   +2 more
openaire   +1 more source

Do kleptoparasites reduce their own foraging effort in order to detect kleptoparasitic opportunities?: An empirical test of a key assumption of kleptoparasitic models

Oikos, 2002
Determining if, or when, individuals trade off time spent personally feeding against time spent monitoring others for kleptoparasitism opportunities is essential to an understanding of the evolution of scrounging and usurpation behaviours. We provide a first field test of whether kleptoparasites reduce their personal foraging effort in situations where
Rik D. Smith, Graeme D. Ruxton, Will Cresswell   +2 more
openaire   +1 more source

Can't bear the competition: Energetic losses from kleptoparasitism by a dominant scavenger may alter foraging behaviors of an apex predator

, 2021
The interspecific interactions of apex predators are integral to the function of ecological communities, but most studies have focused on understanding their top down effects.
M. L. Allen, L. M. Elbroch, H. Wittmer
semanticscholar   +1 more source