Widespread Cannibalism by Fledglings in a Nesting Colony of Black‐crowned Night-Herons

Christina Riehl

doi:10.1676/04-119.1

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Christina Riehl^*,**

^*5500 Camp St., New Orleans, LA 70115, USA
^**Current address: Dept. of Ecology and Evolutionary Biology, Princeton Univ., Princeton, NJ 08544, USA; criehl@princeton.edu

Abstract

I studied the diet and foraging behavior of fledgling Black-crowned Night-Herons (Nycticorax nycticorax) in a mixed-species nesting colony of Black-crowned Night-Herons and Snowy Egrets (Egretta thula) in New Orleans, Louisiana. In 1 of 5 years, cannibalism of nestlings that had fallen or climbed out of nests was common, accounting for 66 of 94 (70.2%) prey items taken by fledglings. Juveniles took younger conspecifics by both predation and scavenging. Isolated incidents of cannibalism among Black-crowned Night-Herons have been reported previously, but not on a colony-wide scale.

Citation Download Citation

Christina Riehl "Widespread Cannibalism by Fledglings in a Nesting Colony of Black‐crowned Night-Herons," The Wilson Journal of Ornithology 118(1), 101-104, (1 March 2006). https://doi.org/10.1676/04-119.1

Received: 2 December 2004; Accepted: 1 September 2005; Published: 1 March 2006

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