Rejection of Artificial Parasite Eggs by Gray Kingbirds in the Bahamas

We added artificial Shiny Cowbird (Molothrus bonariensis) eggs to Gray Kingbird (Tyrannus dominicensis) nests in the Bahamas, where Shiny Cowbirds were first recorded in 1993. Gray Kingbirds ejected 85% of artificial eggs within 48 hr of addition. Based upon the short time of contact between the two...

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Veröffentlicht in:	The Condor (Los Angeles, Calif.) Calif.), 1998-08, Vol.100 (3), p.566-568
Hauptverfasser:	Baltz, Michael E., Burhans, Dirk E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal behavior Animal ethology Animal nesting Animal reproduction Aves Biological and medical sciences Bird nesting Birds Brood parasitism Eggs Flycatchers Fundamental and applied biological sciences. Psychology Molothrus bonairensis Ornithology Oviposition Parasites Personality traits Phenotypic traits Psychology. Psychoanalysis. Psychiatry Short Communications Tyrannus dominicensis Vertebrata
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Beschreibung
Zusammenfassung:	We added artificial Shiny Cowbird (Molothrus bonariensis) eggs to Gray Kingbird (Tyrannus dominicensis) nests in the Bahamas, where Shiny Cowbirds were first recorded in 1993. Gray Kingbirds ejected 85% of artificial eggs within 48 hr of addition. Based upon the short time of contact between the two species, we suggest that egg ejection by Gray Kingbirds in the Bahamas is retention of ejection behavior from ancestral populations.
ISSN:	0010-5422 1938-5129 2732-4621
DOI:	10.2307/1369727